Instruction Manual for SKYRC models including: D750 MIX, D750 MIX Multi Function Smart Charger, D750 MIX, Multi Function Smart Charger, Function Smart Charger, Smart Charger
D750 MIX AC/DC Multi-Function Smart Charger - SkyRC
May 20, 2025 — Scan the QR code to access the user manual. Check the current system status. Check regulatory information. Back to the previous interface. Task. Parameters.
20 May 2025 — Scan the QR code to access the user manual. Check the current system status. Check regulatory information. Back to the previous interface. Task. Parameters.
File Info : application/pdf, 28 Pages, 4.59MB
DocumentDocumentInstruction Manual v. 39 AC/DC Multi-Function Smart Charger Contents Introduction 1 In the Box 1 Getting to know D750 MIX 2 Specification 4 Warning 6 Program Flow Chart 7 Power and Battery Connection & Charging (Demo with 6-Cell LiPo) 9 Battery Operations Matrix 11 Lithium Battery Program (LiPo/LiFe/Li-ion/LiHV) 12 NiMH/NiCd Battery Program 14 Pb Lead-Acid Battery Program 16 DC Power Supply 17 Parallel Charging 17 Reverse Discharge 18 External Discharge 19 Working with the SkyCharger APP 20 Scan to GO 20 PD/QC3.0 Output with USB Type-C 21 Voltage Calibration (For expert user only) 21 Errors Explained 22 Settings 23 Conformity Declaration 24 Warranty and Service 25 Introduction Congratulations on choosing the SkyRC D750 MIX AC/DC Multi-Function Smart Charger! The D750 MIX features two independent channels and supports the vast majority of RC batteries on the market. It handles up to 8-cell LiPo batteries, delivering up to 32A per channel--or an impressive 55A when parallel charging. With dual input options (AC/DC), the D750 MIX adapts easily to any setup. Beyond standard charging, it offers DC power output, parallel charging, and reverse discharge, making it a powerful and versatile all-in-one platform for RC enthusiasts. Before first use, carefully read the manual, warnings, and safety instructions. Incorrect use of the charger or charging batteries improperly can be extremely hazardous, potentially leading to fires or even explosions. In the Box 1 * SkyRC D750 MIX Charger Instruction Manual v. XX 1 * AC Power Cord AC/DC Multi-Function Smart Charger 1 * Quick Start Guide 12* QR Code Sticker - 1 - Getting to know D750 MIX 1 2 3 1 4 5 13 10 8 12 6 11 9 7 14 17 16 15 - 2 - Getting to know D750 MIX - 3 - Specification Item Model Input Voltage Input Current Battery Type Working Modes Option AC DC AC DC LiPo/LiFe/Li-ion/LiHV NiMH/NiCd PB LiPo/LiFe/Li-ion/LiHV Specification D750 MIX 100V-240V(50/60Hz) 9V-49V AC100V/8A, AC240V/3A Single Channel: 32A ±10% Dual Channels: 55A ±10% 1S~8S 1S~20S 3S/6S/12S Balance Charge / Charge / Storage / Discharge/ Parallel Charge / Reverse Discharge NiMH/NiCd Charge/ Re-Peak/ C-D Cycle/ D-C Cycle/ Discharge/ Reverse Discharge Normal/ AGM Charge/ Cold Charge/ Discharge/ PB Reverse Discharge Charge Current LiPo/LiFe/Li-ion/LiHV(2S~8S) 0.1A~0.5A(±0.1A) 0.6A~32A(±10%) LiPo/LiFe/Li-ion/LiHV(1S) NiMH/NiCd 0.1A~0.5A(±0.1A) 0.6A~10A(±10%) PB 0.1A~0.5A(±0.1A) 0.6A~15A(±10%) Balance Current LiPo/LiFe/Li-ion/LiHV 1.9A Max Discharge Current 0.1A-4A Charging Power AC Input 500W DC Input Single Channel: 1100W Dual Channel: 1600W Discharge Power Main Port 45W (±10%) Balance Port 20W Max (LiPo/8s) Lithium Battery Storage Voltage Range LiPo Li-ion LiFe 3.75-3.90V/cell Default: 3.85V 3.70-3.85V/cell Default: 3.80V 3.25-3.40V/cell Default: 3.30V LiHV 3.85-3.95V/cell Default: 3.90V - 4 - Specification Item Discharge Voltage Range Parallel Charge Current Option LiPo Li-ion LiFe LiHV NiMH/NiCd PB 2-8S LiPo/LiFe/Li-ion/LiHV Specification 3.00V-3.40V/cell Default: 3.30V 2.90V-3.30V/cell Default: 3.20V 2.60V-3.00V/cell Default: 2.90V 3.10V-3.50V/cell Default: 3.40V 0.60V-1.00V/cell Default: 0.90V 1.80V-2.00V /cell Default: 1.90V 33A~50A Reverse Discharge Power LiPo/LiFe/Li-ion/LiHV 2S~8S NiMH/ NiCd 8S~20S 1100W PB 3S/6S/12S External Discharge (Channel A) BD350/BD380 0.5A~40A DC Power Supply Type-C App Language Voltage Current Power iOS/ Android Working Environment Storage Environment Dimension Weight Temperature Humidity Temperature Humidity 5V-36V Default: 12V 0.3A-32A Default: 20A AC Input: 500W DC Input: 1100W Protocol: PD3.0 20W 5V/3A 9V/2.2A 12V/1.67A SkyCharger (Default Passcode: 5793) English/ / /Deutsch/Français/Español Default: English 0°C/32°F ~ 40°C/104°F 5%~75% RH, non-condensing. -10°C/14°F ~ 70°C/158°F 5%~75% RH, non-condensing. 180x136x112mm 1626g - 5 - - 6 - Program Flow Chart Note: The flow chart uses one port as an example, as the process for Ports A and B is identical. WARNING! NEVER USE THE CHARGER UNSUPERVISED! LiPo batteries pose a severe risk of fire explosion, serious injury, and property damage if not properly handled. Before use, read and follow all instructions, warnings, and precautions. A LiPo / 4S / Bal. CHG 0.000 V 0.00 A 0 mAh 0W 00:00:00 B LiPo / 4S / Bal. CHG 0.000 V 0.00 A 0 mAh 0W 00:00:00 A LiPo / 4S / Bal. CHG 0.00 V 0.00 A 0 mAh 0W 00:00:00 8B6F- B LiPo / 4S / Bal. CHG 0.00 V 0.00 A 0 mAh 0W 00:00:00 Long Press 5 seconds CHARGER SETTING Task Parameters > Preference > Battery Meter > Factory Settings > User Guide > System Info > Regulatory > Back A CHARGE SETTINGS Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4S(14.8V) Bal. CHG 4.20V 0 3.0A A CHARGE SETTINGS Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4S(14.8V) BLaiPl. oCHG LiH4V.20V LiFe 0 Li-ion3.0A CHARGER SETTING Task Parameters > Preference > Battery Meter > Factory Settings > User Guide > System Info > Regulatory > Back A CHARGE SETTINGS Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4S(14.8V) Bal. CHG 4.20V 0 3.0A A CHARGE SETTINGS Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4S(14.8V) Ba1lS. CHG 23SS4.32.00VA0 CHARGER SETTING Task Parameters > Preference > Battery Meter > Factory Settings > User Guide > System Info > Regulatory > Back A CHARGE SETTINGS Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4S(14.8V) Bal. CHG 4.20V 0 3.0A A CHARGE SETTINGS Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4S(14.8V) BaBla. lC. CHHGG Char4g.2e0V Storage 0 Discha3rg.0eA CHARGER SETTING Task Parameters > Preference > Battery Meter > Factory Settings > User Guide > System Info > Regulatory > Back > Task Parameters Safety Timer Max.Capacity Trickle Charge Keep Voltage 240 Minute 12000 mAh OFF OFF Back > Prefenence Language Max. Input Power Min. Input Voltage LCD BackLight Keypress Beep Notify Beep Completion Tone Warning Back English 500W 10.0V Middle Low Low Once ON > Battery Meter A 1 4.05V 2 4.05V 3 4.05V 4 4.05V 5 4.05V 6 4.05V 7 4.05V 8 4.05V 1m 3m 2m 0m 2m 5m 3m 2m Total 30.13V 28m > Factory Setting Restore Factory Settings? YES NO - 7 - Program Flow Chart Note: The flow chart uses one port as an example, as the process for Ports A and B is identical. A CHARGE SETTINGS Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4S(14.8V) Bal. CHG 4.20V 0 3.0A A CHARGE SETTINGS Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4S(14.8V) Bal. CHG 4.20V 0 3.0A A CHARGE SETTINGS Battery Type: Cell Count: Task: Condition: Cycle: Cycle Mode: LiPo 4S(14.8V) Bal. CHG 4.20V 1 C->D A CHARGE SETTINGS Cell Count: Task: Condition: Cycle: Cycle Mode: Charge Current: 4S(14.8V) Bal. CHG 4.20V 1 C->D 3.0A A CHARGE SETTINGS Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4S(144..81V8V) Bal. 4C.1H9GV 44..2200VV 4.210V 43.2.02AV A CHARGE SETTINGS Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4BSa(0123l1.44C3..28.H00VGAV0) A CHARGE SETTINGS Battery Type: Cell Count: Task: Condition: Cycle: Cycle Mode: LiPo 4S(14.8V) Bal. CHG CD-->>4CDC.2->0DV0 A CHARGE SETTINGS Cell Count: Task: Condition: Cycle: Cycle Mode: Charge Current: 2.8A 2.9A 3.0A 3.1A 3.2A CHARGER SETTING Task Parameters > Preference > Battery Meter > Factory Settings > User Guide > System Info > Regulatory > Back CHARGER SETTING Task Parameters > Preference > Battery Meter > Factory Settings > User Guide > System Info > Regulatory > Back CHARGER SETTING Task Parameters > Preference > Battery Meter > Factory Settings > User Guide > System Info > Regulatory > Back > User Guide Scan to View > System Info Hardware Version: 1.00 Software Version: 2.59 Blue Addr: 8B6F Password: XXXX SN: 1465423456789565456153125 > Regulatory - 8 - Program Flow Chart Note: The flow chart uses one port as an example, as the process for Ports A and B is identical. A CHARGE SETTINGS Task: Bal. CHG Condition: 4.20V Cycle: 1 Cycle Mode: C->D Charge Current: 3.0A Discharge Current: 2.0A A CHARGE SETTINGS Task: Condition: Cycle: Cycle Mode: Charge Current: Discharge Current: 1.8A 1.9A 2.0A 2.1A 2.2A A CHARGE SETTINGS Condition: Cycle: Cycle Mode: Charge Current: Discharge Current: Rest Time: 4.20V 1 C->D 3.0A 2.0A 60 Sec 50oC A CHARGE SETTINGS Condition: Cycle: Cycle Mode: Charge Current: Discharge Current: Rest Time: 40 50 60 120 180 A CHARGE SETTINGS Cycle: Cycle Mode: Charge Current: Discharge Current: Rest Time: Temp. Cut-off: 1 C->D 3.0A 2.0A 60 Sec 50oC A CHARGE SETTINGS Cycle: Cycle Mode: Charge Current: Discharge Current: Rest Time: Temp. Cut-off: 48 49 50 51 52 A CHARGE SETTINGS Cycle Mode: Charge Current: Discharge Current: Rest Time: Temp. Cut-off: Start C->D 3.0A 2.0A 60 Sec 50oC A LiPo / 4S / Bal. CHG .16.60 V 7 91A 548 mAh 131 W 00:00:00 8B6F- B LiPo / 4S / Bal. CHG 0.00 V 0.00 A 0 mAh 0W 00:00:00 - 9 - Power and Battery Connection & Charging (Demo with 6-Cell LiPo) 1. Connect to the Power Source SkyRC D750 MIX supports two types of power input: AC 100-240V and DC 9-49V Scan or Click to Watch XT90 12V Pb battery or compatible DC power source * AC Input: Long press the AC power button to turn on. DC Input: It powers on automatically once the power supply is connected. 100240V AC outlet 2. Connect the Battery To avoid short circuit, connect charge leads to charger first, then battery. Disconnect in reverse order. 1.LiPo Battery Connection with Balance Connector. LiPo Battery NiMH Battery 2. Select Channel A or B where the battery is connected. 3. Press the scroll wheel to configure the charging parameters: Battery type Number of cells Target voltage Charge current Cut-off temperature Press "Start" to begin charging. For safety reasons, it is highly recommended to charge Lithium batteries (LiPo, Li-ion, LiFe and LiHV) using Balance CHG mode unless the battery comes without a balance connector. The balance wire attached to the battery must be connected to the charger with the black wire aligned with the negative (-) marking. Ensure correct polarity! - 10 - Battery Operations Matrix This table lists all the operations that D750 MIX can perform based on the battery type. Battery Type Working Mode LiPo Li-ion LiFe LiHV Balance CHG Charge Storage Description This mode is to balances charge the lithium battery according to the user-defined charging rate. It ensures each cell of the battery is balanced. This mode charges the lithium battery based on the selected charging rate. This mode stores the battery via charging or discharging its voltage to a specific storage value. Discharge This mode is to discharge the lithium battery based on the selected discharging rate. Parallel Charge This mode is to parallel charge the battery with a higher charge rate of up to 50.0A. Reverse Discharge Reverse discharge mode allows transferring energy from an idle battery to another. NiMH Charge NiCd Discharge This mode charges the NiMH/NiCd battery based on the selected charging rate. This mode is to discharge the NiMH/NiCd battery based on the discharging rate selected. Repeak In Repeak mode, the charger automatically peaks the battery twice in a row. This helps ensure the NiMH/NiCd battery is fully charged. Cycle_D_C A cyclic and continuous process of 1 to 3 discharge > charge cycles can be used to refresh and restore the performance of NiMH/NiCd batteries. Cycle_C_D A cyclic and continuous process of 1 to 3 charge > discharge cycles can be used to refresh and restore the performance of NiMH/NiCd batteries. Reverse Discharge Reverse discharge mode allows transferring energy from an idle battery to another. Pb Normal This mode charges the Pb battery based on the selected charging rate. AGM Charge This mode charges the AGM battery based on the selected charging rate. Cold Charge This mode charges the Pb battery under a low temperature based on the selected charging rate. Discharge This mode is to discharge the Pb battery based on the selected discharging rate. Reverse Discharge Reverse discharge mode allows transferring energy from an idle battery to another. - 11 - Lithium Battery Program (LiPo/LiFe/Li-ion/LiHV) / Select Port Short press button A or B to select the channel. Enter Charge Settings Press the Scroll button to enter Charge Settings. A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4S(14.8V) BLaiPl. oCHG LiH4V.20V LiFe 0 Li-ion3.0A A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4S(14.8V) Ba1lS. CHG 2S4.20V 3S 0 3.0A A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4S(14.8V) BaBla. lC. CHHGG Char4g.2e0V Storage 0 Discha3rg.0eA A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4S(144..81V8V) Bal. 4C.1H9GV 44..2200VV 4.210V 43.2.02AV A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4BSa(0123l1.44C3..28.H00VGAV0) A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Cycle: Cycle Mode: LiPo 4S(14.8V) Bal. CHG CD-->>4CDC.2->0DV0 Select Battery Type Press the Scroll button to open the Battery Type menu, then scroll to choose your preferred lithium battery type. Set Battery Cell Scroll and short-press the button to select the correct battery cells. Select Task Scroll and short-press the button to select the working mode. Set Cut-off Condition Scroll and short-press the button to set the cut-off voltage. Select cycle times Scroll and short-press the button to set the cycle count (0-3). Select Cycle Mode Scroll and short-press the button to choose the cycle mode (required when cycle times 1). - 12 - Lithium Battery Program (LiPo/LiFe/Li-ion/LiHV) A CHARGE SETTING Cell Count: Task: Condition: Cycle: Cycle Mode: Charge Current: 2.8A 2.9A 3.0A 3.1A 3.2A A CHARGE SETTING Task: Condition: Cycle: Cycle Mode: Charge Current: Discharge Current: 1.8A 1.9A 2.0A 2.1A 2.2A A CHARGE SETTING Condition: Cycle: Cycle Mode: Charge Current: Discharge Current: Rest Time: 40 50 60 120 180 A CHARGE SETTING Cycle: Cycle Mode: Charge Current: Discharge Current: Rest Time: Temp. Cut-off: 48 49 50 51 52 A CHARGE SETTING Cycle Mode: Charge Current: Discharge Current: Rest Time: Temp. Cut-off: Start C->D 3.0A 2.0A 60 Sec 50oC A CHARGE SETTING Charge Current: Discharge Current: Rest Time: Temp. Cut-off: Start Back 3.0A 2.0A 60 Sec 50oC Select Charge Current Scroll and short-press the button to set the desired working current. Select Discharge Current Scroll and short-press the button to set the desired working current (required when cycle times 1). Select the Rest Time Scroll and short-press the button to set the rest time (required when cycle times 1). Temperature Cut-off Setting Scroll and short-press the button to set temperature protection thresholds. Start Press the Scroll button to confirm and start the program. Back Press to return to the main interface. Stop Long press the Stop button to terminate the current program. Note: Ensure that AC and DC power are not connected simultaneously. Do not connect the battery before powering on the charger. See page 17/18 for Parallel Charging/Reverse Discharge setup. - 13 - NiMH/NiCd Battery Program / Select Port Short press button A or B to select the channel. Enter Charge Settings Press the Scroll button to enter Charge Settings. A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Charge Current: Temp. Cut-off: LiHV LiFe NiMH NiCd PB A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Charge Current: Temp. Cut-off: 1S 2S 3S A CHARGE SETTING Battery Type: Cell Count: Task: Charge Condition: Re-Peak Charge Current: C>D Cycle Temp. Cut-off: A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: -4 mV -5 mV -6 mV -7 mV -8 mV A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: LiPo 4S(14.8V) Ba1l. CHG 24.20V 3 0 3.0A A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Cycle: Charge Current: 2.8ALiPo 4S2.(91A4.8V) B3a.0l. ACHG 3.14A.20V 3.2A3.0A0 Select Battery Type Press the Scroll button to open the Battery Type menu, then scroll to choose your preferred lithium battery type. Set Battery Cell Scroll and short-press the button to select the correct battery cells. Select Task Scroll and short-press the button to select the working mode. Set Cut-off Condition Scroll and short-press the button to set the delta voltage. Select cycle times Scroll and short-press the button to set the cycle count (0-3). Select Charge Current Scroll and short-press the button to set the desired working current. - 14 - NiMH/NiCd Battery Program A CHARGE SETTING Cell Count: Task: Condition: Cycle: Charge Current: Discharge Current: 1.8A 1.9A 2.0A 2.1A 2.2A A CHARGE SETTING Task: Condition: Cycle: Charge Current: Discharge Current: Rest Time: 10 11 12 13 14 A CHARGE SETTING Condition: Cycle: Charge Current: Discharge Current: Rest Time: Temp. Cut-off: 48 49 50 51 52 Select Discharge Current Scroll and short-press the button to set the desired working current. Select the Rest Time Scroll and short-press the button to set the rest time. Temperature Cut-off Setting Scroll and short-press the button to set temperature protection thresholds. A CHARGE SETTING Cycle: 1 Charge Current: 3.0A Discharge Current: 2.0A Rest Time: 10 Minute Temp. Cut-off: 50oC Start A CHARGE SETTING Charge Current: 1 Discharge Current: 3.0A Rest Time: 2.0A Temp. Cut-off: 10 Minute Start 50oC Back Start Press the Scroll button to confirm and start the program. Back Press to return to the main interface. Stop Long press the Stop button to terminate the current program. Note: Ensure that AC and DC power are not connected simultaneously. Do not connect the battery before powering on the charger. See page 18 for Reverse Discharge setup. - 15 - Pb Lead-Acid Battery Program / A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Charge Current: Start Back NiMH PB 6SN(iC12d.0V) PNBormal 2.40V 3.0A A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Charge Current: Start PB 6S(12.0V) 1NSormal 23SS2.34.00VA Back A CHARGE SETTING Battery Type: PB Cell Count: 6S(12.0V) Task: NoNrmoarml al Condition: AGM C2h.a4r0gVe Charge Current: Cold Ch3a.r0gAe Start Back A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Charge Current: Start Back PB 6S2(1.320.0VV) 2N.3o5rmVal 2.420.4V0V 2.453V.0A 2.50V A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Charge Current: Start 2.8A PB 6S2.(91A2.0V) 3.N0oArmal 33..122AA.34.00VA Back A CHARGE SETTING Battery Type: Cell Count: Task: Condition: Charge Current: Start Back PB 6S(12.0V) Normal 2.40V 3.0A Select Port Short-press the A/B button to select the channel. Enter Charge Settings Press the Scroll button to enter Charge Settings. Select Battery Type Press the Scroll button to open the Battery Type menu, then scroll to choose your preferred lithium battery type. Set Battery Cell Scroll and short-press the button to select the correct battery cells. Select Task Scroll and short-press the button to select the working mode. Set Cut-off Condition Scroll and short-press the button to set the cut-off voltage. Select Charge Current Scroll and short-press the button to set the desired working current. Start Press the Scroll button to confirm and start the program. Back Press to return to the main interface. Stop Long press the Stop button to terminate the current program. Note: Ensure that AC and DC power are not connected simultaneously. Do not connect the battery before powering on the charger. See page 18 for Reverse Discharge setup. - 16 - DC Power Supply SkyRC D750 MIX supports DC power output via both AC and DC input. Once activated, it can supply power to DC devices. Short press to set the output voltage (5V36V) and current (0.3A32A). Use the " " and " " buttons to adjust the values. Long press to turn the DC power function on or off. Scan or Click to Watch Power Supply Output Notes: 1. Both output ports can work independently. Parallel operation only when using both outputs simultaneously. Series connection will destroy the unit. 2. No reverse polarity protection on output ports. Reverse connection will damage the unit. Parallel Charging SkyRC D750 MIX offers a Parallel Charging mode to deliver higher charging current. Note: Parallel Charging is only supported for lithium batteries. Other battery types are not supported! Use the dedicated parallel charging cable* for this product to correctly connect the battery's main lead and balance lead. Scan or Click to Watch 1. Select the channel to which the battery's balance lead is connected, e.g., Channel A; 2. Choose the correct battery type (LiPo / LiFe / Li-ion / LiHV); 3. In the task menu, select the "Parallel Charge" program; 4. Set the charging current (adjustable range: 3350A); 5. Once all settings are complete, press "Start" to begin parallel charging. *The parallel charging cable is sold separately! LiPo Battery - 17 - Reverse Discharge With Reverse Discharge mode, SkyRC D750 MIX allows you to transfer energy from an idle battery to another battery, reducing energy waste. LiPo Battery Scan or Click to Watch NiMH Battery Example: For instance, we use Channel B to discharge the source battery and Channel A to charge the target battery. 1. Select the correct battery type. Only following battery types are supported(the charge side has no restrictions): 28S LiXX 820S NiXX 3S / 6S / 12S Pb 2. Select the number of cells (optional). If the balance lead is connected, the system can automatically detect the cell count. You may also set it manually. If no balance lead is connected, manual input is required. 3. From the task menu, select "Reverse Discharge." 4. Configure Discharge parameters: Cut-off voltage Discharge current Cut-off temperature 5. Press "Continue at A" to Configure Charge parameters: Battery type Number of cells Target voltage Charge current Cut-off temperature 6. Press "Start" to begin reverse discharge. Notes: AC Input: no voltage limit; DC input: must be <40V to enable reverse discharge function. Cannot operate simultaneously with DC power input Cannot operate simultaneously with Type-C input Minimum discharge power requirement: >20W (system will not activate below this threshold) - 18 - External Discharge D750 MIX supports external discharge, reaching up to 40A when connected to the BD350/BD380 discharger. Scan or Click to Watch LiPo Battery 1. Once the power supply is connected, D750 MIX powers up and enters the main interface automatically; 2. Connect the BD350/BD380 discharger to D750 MIX; 3. Connect the battery to Port A on D750 MIX; 4. Select the battery type, number of cells, discharge program, cut-off voltage, and discharge current; 5. Start the program once the settings are configured. Note: The BD350/BD380 discharger is not included and must be purchased separately. External discharge is available only on Port A. - 19 - Working with the SkyCharger APP This charger comes equipped with a built-in Bluetooth 5.0 module, enabling users to easily control the charger via the SkyCharger app. Firmware upgrades are also supported through the SkyCharger app. Scan the QR code below to download the SkyCharger app. Firmware Upgrade 1. Open the SkyCharger app. 2. Tap "+" to add the device, verify the corresponding Bluetooth number, and connect to D750 MIX. 3. Enter the Settings page, when the SkyCharger app detects a new firmware, choose to upgrade. 4. Wait for the progress bar to reach 100%. Scan to GO The charger comes with QR code stickers for instant setup. Register QR Code 1. Connect the D750 MIX charger to the SkyCharger app. 2. Tap "Scan to Go" in the charging settings interface. 3. Scan the QR Code. 4. Select Channel A/B 5. Set the charging/discharging parameters. 6. Tap "Save" Scan to Charge 1. Connect the D750 MIX charger to the SkyCharger app. 2. Tap "Scan to Go" in the charging settings interface. 3. Scan the registered QR code, confirm the parameters, and tap "Start" to initiate charge or discharge operations. On the scanning interface, tap "My Battery" to view the registered batteries for each channel. From this list, you can initiate charge/discharge operations with one tap or check the battery's historical charge/discharge data. Notice: Scan to Go doesn't support Reverse Discharge mode. - 20 - PD/QC3.0 Output with USB Type-C In addition to charging RC batteries, the charger can also charge mobile devices through the USB Type-C PD/QC3.0 output with a charging power of up to 20W. Voltage Calibration (For expert user only) You can calibrate the voltage directly on the charger with a 8S LiPo battery. For more information, please contact us at info@skyrc.com. - 21 - Errors Explained In the event of a fault, D750 MIX will display an error message indicating issues such as connection problems or battery mismatches. Refer to the table below for troubleshooting solutions based on the error code. Errors Message Input Volt Too Low! Input Volt Too High! Connection Break! Cell Count Error! Battery Type Capacity Limit! Time Limit! Int. Temp. Too High! Parallel charge and DC power can't operate together! Overload Protection! Reversed Polarity! Fully Charged! Output Overload! Balance Port Error! Cell Volt Diff! The Allocable Power has Reached its Maximum. No Current! Offline! Ensure the Correct Discharger! Port Voltage Exceeds Set Voltage! No Available Power Output! Reverse Dchg and DC Power can't run together! Input volt. > 40V! Mismatch with reverse discharge settings! Reverse discharge power < 20W PD active, limited reverse discharge power! Explanation Input Volt Too Low! Input Volt Too High! The battery connection is broken! Cell Count Error! The battery type is wrong! Charge/Discharge capacity exceeds the MAX.Capacity limits set in the system setting. Charge/Discharge capacity exceeds the Safety Timer limits set in the system setting. The internal temperature is high! Parallel charge and DC power can't operate together! The charger is overloaded! The battery connection is reversed! The battery is fully charged already! Output Overload! Balance Port Error! The voltage difference between each cell is high! The Allocable Power has Reached its Maximum. No Current Detected at Discharge Terminal! Discharger offline. Ensure the Correct Discharger! DC Power Supply Output Port Voltage Exceeds Set Value! No Available Power Output! Reverse Dchg and DC Power can't run together! DC input>40V! Incompatible with Reverse Discharge Mode! Reverse discharge power < 20W. Incompatible with Reverse Discharge Mode! PD active, limited reverse discharge power! - 22 - Settings On the main interface, hold the Start button for five seconds to enter the system settings. Menu Task Parameters Option Safety Timer Max.Capacity Trickle Charge Keep Voltage Preference Back Language Max. Input Power Min. Input Voltage LCD BackLight Keypress Beep Notify Beep Completion Tone Battery Meter Factory Setting User Guide System Info Regulatory Back Warning Back N/A N/A N/A N/A N/A N/A Definition Customize a period for program protection. Customize the maximum capacity. Enable/disable trickle charge. Enable/disable holding voltage. If the difference great than 0.02V between each cells detected, a small current will be applied to keep the battery voltage. Back to the previous interface. Select your desired system language. AC Input: 500W DC Input: 100~1600W, default: 1000W 9-34.5V adjustable, default: 10V In DC Input, set the minimum voltage for input protection. Adjust the brightness of the screen. Adjust/Turn off the volume of the keypress beep. Adjust/Turn off the volume of the notify beep. Choose the way you'd like to be reminded when the program completes. If Repeat is chosen, the charger will play the completion signal every half an hour. Enable/disable boot warning. Back to the previous interface. Measure the battery voltage and internal resistance. (switch between ports A and B by pressing the Port button. ) Restore to the factory setting. Scan the QR code to access the user manual. Check the current system status. Check regulatory information. Back to the previous interface. - 23 - Conformity Declaration D750 MIX satisfies all relevant and mandatory CE directives and FCC Part 15 Subpart B. Test Standard EN 62368-1 EN-55032 EN-55035 EN 61000-3-2 EN 61000-3-3 EN 300328 EN 301489-1 EN 301489-17 EN 50663: 2017 EN 62479 FCC Part Subpart 15B Title Audio/Video, Information and communication technology equipment part 1: Safety requirement Electromagnetic compatibility of multimedia equipment Emission requirements Electromagnetic compatibility of multimedia equipment Immunity requirements Electromagnetic compatibility (EMC) Part 3-2: Limits for harmonic current emissions (equipment input current up to and including 16 A per phase) Electromagnetic compatibility (EMC) - Part 3-3: Limitation of voltage supply systems for equipment with rated current 16 A. Electromagnetic compatibility and Radio spectrum Matters (ERM); Wideband transmission systems; Data transmission equipment operating in the 2.4 GHz ISM band and using wide band modulation techniques; Harmonized EN covering essential requirements under article 3.2 of the R&TTE Directive. Electromagnetic compatibility and Radio spectrum Matters (ERM); ElectroMagnetic Compatibility (EMC) standard for radio equipment and services; Part 1: Common technical requirements. Part 17: Specific conditions for Broadband Data Transmission Systems. Generic standard for assessment of low power electronic and electrical equipment related to human exposure restrictions for electromagnetic fields (10 MHz - 300 Ghz) Assessment of the compliance of low power electronic and electrical equipment with the basic restrictions related to human exposure to electromagnetic fields (10 MHz to 300 Ghz) Title 47 Telecommunication PART 15 - RADIO FREQUENCY DEVICES Subpart B - Unintentional Radiators Result Conform Conform Conform Conform Conform Conform Conform Conform Conform Conform - 24 - Warranty and Service Liability Exclusion This charger is designed and approved exclusively for use with the types of battery stated in this Instruction Manual. SkyRC accepts no liability of any kind if the charger is used for any purpose other than that stated. We are unable to ensure that you follow the instructions supplied with the charger, and we have no control over the methods you employ for using, operating, and maintaining the device. For this reason, we are obliged to deny all liability for loss, damage, or costs that are incurred due to the incompetent or incorrect use and operation of our products, or which are connected with such operation in any way. Unless otherwise prescribed by law, our obligation to pay compensation, regardless of the legal argument employed, is limited to the invoice value of those SkyRC products which were immediately and directly involved in the event in which the damage occurred. Warranty and Service We guarantee this product to be free of manufacturing and assembly defects for a period of one year from the time of purchase. The warranty only applies to material or operational defects, which are present at the time of purchase. During that period, we will repair or replace free of service charge for products deemed defective due to those causes. This warranty is not valid for any damage or subsequent damage arising as a result of misuse, modification, or as a result of failure to observe the procedures outlined in this manual. Note: 1. The warranty service is valid in China only. 2. If you need warranty service overseas, please contact your dealer in the first instance, who is responsible for processing guarantee claims overseas. Due to high shipping costs, and complicated custom clearance procedures to send back to China, please understand that SkyRC can't provide warranty service to overseas end users directly. 3. If you have any questions which are not mentioned in the manual, please feel free to send an email to info@skyrc.com The manual is subject to change without notice; please refer to our website for the latest version! - 25 -Corel PDF Engine Version 22.0.0.412