1. Introduction
This manual provides detailed instructions for the safe and efficient operation of your COSOOS MiBOXER C4-12 Universal 4-Bay Smart Battery Charger. This intelligent charger is designed to accommodate a wide range of rechargeable battery types and sizes, offering advanced features such as rapid charging, temperature control, and comprehensive display information. Please read this manual thoroughly before first use to ensure proper functionality and safety.
Image 1: The COSOOS MiBOXER C4-12 Smart Battery Charger and its included power adapter.
2. Safety Information
Please read all safety warnings and instructions before using this product. Failure to follow these instructions may result in electric shock, fire, or serious injury.
- General Safety: Always use the charger in a dry, well-ventilated area. Avoid exposure to water, high temperatures, or direct sunlight.
- Battery Compatibility: Only charge compatible rechargeable batteries as specified in this manual. Attempting to charge non-rechargeable batteries or incompatible types may cause explosion or leakage.
- Temperature Control: The charger features intelligent temperature control. If the battery temperature exceeds 60℃ (140℉), the charging speed will be reduced. If it exceeds 70℃ (158℉), charging will stop automatically.
- Overcharge Protection: The charger automatically stops charging when batteries are fully charged to prevent overcharging.
- Reverse Polarity & Short Circuit Protection: The charger is equipped with protection against incorrect battery insertion and short circuits. An error symbol will be displayed if detected.
- Activation Function: The smart charger can activate over-discharged batteries.
- Supervision: Do not leave the charger unattended during operation, especially when charging for the first time.
- Damage: If the charger or power adapter is damaged, discontinue use immediately and contact customer support.
Image 2: The charger features multiple protection mechanisms including flame-retardant materials, reverse battery protection, and short circuit protection.
3. Package Contents
Verify that all items are present in your package:
- 1 x COSOOS MiBOXER C4-12 Smart Battery Charger (Batteries not included)
- 1 x Power Adapter (12V/5A)
- 1 x User Manual
Image 3: The package includes the C4-12 charger, power adapter, and user manual.
4. Specifications
| Parameter | Value |
|---|---|
| Model | C4-12 |
| Dimensions | 6.2in x 4.7in x 1.7in (15.7cm x 11.9cm x 4.3cm) |
| Weight | 485g (1.07 lbs) |
| Material | Fireproofing PC+ABS |
| Input Voltage/Current | DC 12V 5A |
| Output Current (Li-ion) | Maximum 4*3A |
| Output Current (Ni-MH/Ni-Cd) | Maximum 4*1A |
| Compatible Li-ion Batteries | 10340, 10350, 10440, 10500, 12340, 12500, 12650, 13450, 13500, 13650, 14350, 14430, 14500, 14650, 16500, 16340 (RCR123), 16650, 17350, 17500, 17650, 17670, 18350, 18490, 18500, 18650, 18700, 20700, 21700, 22500, 22650, 25500, 26500, 26650 (4.2V, 4.35V, 3.6V LiFePO4) |
| Compatible Ni-MH/Ni-Cd Batteries | AA, AAA, AAAA, C, SC (1.48V) |
| Display | Multi-functional LCD |
5. Setup
- Unpack: Carefully remove the charger and all accessories from the packaging.
- Connect Power: Insert the DC plug of the power adapter into the input port on the back of the charger. Plug the AC end of the power adapter into a standard wall outlet (AC 90-260V). The LCD display will illuminate.
- Initial Display: Upon power-up, the LCD will show a brief self-test, then display 'NULL' for empty slots.
6. Operating Instructions
The C4-12 charger features four independent charging bays, allowing simultaneous charging of different battery types.
6.1 Inserting Batteries
- Identify the correct polarity (+/-) on your battery and the charger slot.
- Gently slide the battery into an empty charging slot, ensuring proper contact with the positive and negative terminals. The spring-loaded negative pole slide track accommodates various battery lengths.
- The charger will automatically detect the battery type (Li-ion, Ni-MH/Ni-Cd) and begin charging. The LCD will display charging information for that slot.
6.2 Understanding the LCD Display
The large LCD display provides real-time information for each charging slot:
- Battery Type: Indicates detected battery chemistry (e.g., Li-ion 4.2V, Ni-MH/Ni-Cd).
- Voltage (V): Current battery voltage.
- Current (A): Current charging amperage.
- Charging Time: Elapsed charging duration.
- Battery Capacity (mAh/mWh): Accumulated charge capacity.
- Internal Resistance (mΩ): Displays the battery's internal resistance.
- Temperature (℃/℉): Real-time battery temperature.
- Battery Percentage: Estimated charge level.
- Charge Symbol: Indicates active charging.
Image 4: The LCD provides rich information including battery type, temperature, internal resistance, current, voltage, and charge status.
6.3 Mode and Slot Buttons
Use the 'SLOT' and 'MODE' buttons to interact with the charger:
- SLOT Button: Press to cycle through the display information for each individual charging slot.
- MODE Button: After selecting a slot with the 'SLOT' button, press 'MODE' to change charging parameters (e.g., voltage for Li-ion batteries like 4.2V, 4.35V, or 3.6V LiFePO4). A long press may be required to enter mode selection.
The charger automatically selects the optimum charge current. For Li-ion batteries, the maximum is 3A per bay. For Ni-MH/Ni-Cd batteries, the maximum is 1A per bay.
Image 5: Key features include 3A/bay charging for Li-ion, automatic battery recognition, intelligent temperature control, and support for various battery types.
7. Maintenance
To ensure the longevity and optimal performance of your COSOOS MiBOXER C4-12 charger:
- Cleaning: Disconnect the charger from power before cleaning. Use a soft, dry cloth to wipe the surface. Do not use abrasive cleaners or solvents.
- Storage: Store the charger in a cool, dry place away from direct sunlight and moisture when not in use.
- Inspection: Periodically inspect the power adapter and charging slots for any signs of damage or wear.
8. Troubleshooting
If you encounter issues with your charger, refer to the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Display shows 'Error' or 'NULL' | Incorrect battery insertion, short circuit, or incompatible battery. | Ensure battery is inserted with correct polarity. Check for any foreign objects in the slot. Verify battery type is compatible. |
| Battery not charging | Poor contact, battery too deeply discharged, or charger malfunction. | Re-insert battery, ensuring good contact. The charger may attempt to activate deeply discharged batteries automatically. If not, the battery may be beyond recovery. |
| Charger or battery becomes excessively hot | High ambient temperature, faulty battery, or internal issue. | Ensure adequate ventilation. The charger will reduce current or stop charging if temperature limits are exceeded. If overheating persists, remove battery and discontinue use. |
| LCD backlight dims after 1 minute | Normal operation. | This is a power-saving feature. Press any button to re-illuminate. |
9. Warranty and Support
COSOOS products are manufactured with quality and reliability in mind. For warranty information or technical support, please refer to the contact details provided on the product packaging or visit the official COSOOS website. Keep your purchase receipt as proof of purchase for any warranty claims.
