1. Introduction and Overview
The DEFA SmartCharge 8 is designed to be the most user-friendly battery charger available. Its operation is straightforward, requiring only a simple button press to initiate the charging process. Before charging, the device intelligently analyzes the battery to determine and apply the ideal charging current.
This charger is compatible with various battery types, including normal lead-acid, EFB, GEL, and AGM batteries. For AGM batteries, a dedicated button is available to increase the charging end voltage to 14.7 volts, ensuring a complete charge.
The DEFA SmartCharge 8 is also splash-proof, meeting the IP65 protection class, making it suitable for various environments. It is ideal for batteries with capacities ranging from 20 Ah to 200 Ah, commonly found in cars, campers, and boats.
A unique feature of this charger is its ability to function as a voltage source during battery replacement, preventing the loss of vehicle settings like radio codes. Its design incorporates comprehensive safety features, including reverse polarity protection, overheating protection, and spark prevention, ensuring safe operation.
2. Safety Information
Always prioritize safety when operating the DEFA SmartCharge 8. Adhere to the following guidelines:
- Correct Connection: The charger is equipped with a safety feature that recognizes whether the battery clamps are connected correctly. Ensure proper polarity before starting.
- Protection Features: The device is fully protected against reverse polarity, sparking, and short circuits. However, always exercise caution during connection and disconnection.
- Overheating Protection: The charger includes overheating protection. If the unit becomes excessively hot, it may temporarily reduce or stop charging to prevent damage.
- Environmental Protection: The DEFA SmartCharge 8 is splash-proof (IP65 rated). While it can withstand splashes, avoid submerging the unit in water. Keep it dry and clean for optimal performance.
- Ventilation: Ensure adequate ventilation around the charger during operation to prevent heat buildup.
- Children and Pets: Keep the charger and its cables out of reach of children and pets.
- Damaged Cables: Do not use the charger if the cables or the unit itself appear damaged. Contact qualified service personnel for repairs.
3. Product Features
The DEFA SmartCharge 8 offers several key features designed for efficiency and ease of use:
- Simple Operation: Connect to your battery, press the on-button, and the charging process begins with prior analysis of the battery.
- Extensive Safety: Recognizes whether the clamps are correctly connected and is fully protected against reverse polarity, sparking, and short circuits.
- Network Function (Voltage Source): Serves as a power supply during car battery replacement and thus helps protect vehicle settings.
- Wide Application: Suitable for all lead-acid batteries from 20 Ah to 200 Ah, whether starter, traction, or supply batteries.
- Compact Design: Features a convenient size of 235 x 90 x 54 mm and practical cable storage, making it ideal for portability.
4. Setup
Follow these steps to set up your DEFA SmartCharge 8:
- Unpack the Charger: Carefully remove the DEFA SmartCharge 8 and its components from the packaging.
- Inspect for Damage: Before use, visually inspect the charger, cables, and clamps for any signs of damage. Do not use if damaged.
- Connect to Battery:
- Connect the red (+) clamp to the positive (+) terminal of the battery.
- Connect the black (-) clamp to the negative (-) terminal of the battery.
- Ensure a secure connection. The charger has reverse polarity protection, but correct connection is always recommended.
- Connect to Power Outlet: Plug the charger's power cord into a suitable electrical outlet.

Figure 4.1: Front view of the DEFA SmartCharge 8, showing the main unit and attached battery clamps.
5. Operating Instructions
Operating the DEFA SmartCharge 8 is simple and intuitive:
- Initial Connection: Once the battery clamps are connected to the battery and the charger is plugged into a power outlet, the charger will perform an initial check.
- Start Charging: Press and hold the main power button (usually marked with a power symbol) for approximately 5 seconds. The charging process will then begin.
- Battery Analysis: Before actively charging, the smart device will analyze the connected battery to determine its condition and select the ideal charging current.
- Charging Indicator: Monitor the indicator lights on the charger to observe the charging status. (Note: Specific indicator light meanings are typically detailed on the device or in a quick start guide. Refer to the device for exact interpretations.)
- Charging Completion: The charger will automatically stop charging once the battery is fully charged.
- Disconnecting: First, unplug the charger from the power outlet. Then, disconnect the black (-) clamp from the battery, followed by the red (+) clamp.
6. Battery Types and Charging Modes
The DEFA SmartCharge 8 is versatile and supports various battery chemistries:
- Supported Battery Types:
- Normal Lead-Acid Batteries
- EFB (Enhanced Flooded Battery)
- GEL Batteries
- AGM (Absorbent Glass Mat) Batteries
- AGM Battery Special Mode: For AGM batteries, there is a specific button or mode that, when activated, increases the charging end voltage to 14.7 volts. This ensures a complete and optimal charge for AGM battery types. Consult the charger's interface for the specific button or indicator for this mode.
7. Battery Change Function (Voltage Source)
The DEFA SmartCharge 8 can act as a temporary voltage source, which is particularly useful when replacing a vehicle's battery. This function helps prevent the loss of critical vehicle settings, such as radio codes, seat memory, or engine management data, which can occur when the vehicle's power supply is completely disconnected.
To utilize this function:
- Connect Charger: Before disconnecting the old battery, connect the DEFA SmartCharge 8 to the vehicle's battery terminals (or designated power points, if available) ensuring correct polarity.
- Activate Voltage Source Mode: Press and hold the main power button for 5 seconds. This will activate the voltage source function, providing continuous power to the vehicle's systems.
- Replace Battery: With the DEFA SmartCharge 8 maintaining power, safely disconnect and remove the old battery, then install the new battery.
- Disconnect Charger: Once the new battery is securely connected, you can then disconnect the DEFA SmartCharge 8.
This feature ensures a smooth battery replacement process without the need to reprogram vehicle electronics.
8. Maintenance
Proper maintenance ensures the longevity and reliable operation of your DEFA SmartCharge 8:
- Cleaning: Clean the charger's exterior with a soft, dry cloth. Do not use abrasive cleaners or solvents. Ensure the unit is unplugged before cleaning.
- Cable Inspection: Regularly inspect the charging cables and clamps for any signs of wear, cuts, or damage. Replace damaged components immediately.
- Storage: When not in use, store the charger in a cool, dry place, away from direct sunlight and extreme temperatures. Utilize the practical cable storage feature to keep cables tidy and prevent damage.

Figure 8.1: Side view of the DEFA SmartCharge 8, illustrating its compact design and integrated cable storage.
9. Troubleshooting
If you encounter issues with your DEFA SmartCharge 8, refer to the following common troubleshooting steps:
| Problem | Possible Cause | Solution |
|---|---|---|
| Charger not turning on/no indicator lights | No power from outlet; loose power connection; faulty unit. | Check power outlet with another device. Ensure power cord is securely plugged into charger and outlet. If problem persists, contact support. |
| Charger not starting to charge | Incorrect battery connection (reverse polarity); battery too deeply discharged; button not held long enough. | Verify correct clamp polarity (+ to +, - to -). Ensure battery voltage is above minimum threshold for charging. Press and hold the power button for 5 seconds. |
| Charger stops charging prematurely | Battery fully charged; overheating; internal fault. | Check battery charge level. Ensure adequate ventilation around the charger. If overheating is suspected, let it cool down. If problem persists, contact support. |
| Charger indicator lights flashing abnormally | Error condition (e.g., short circuit, faulty battery). | Disconnect charger from battery and power. Reconnect carefully. If error persists, the battery or charger may be faulty. |
If these steps do not resolve the issue, please contact DEFA customer support for further assistance.
10. Specifications
Detailed technical specifications for the DEFA SmartCharge 8:
| Specification | Value |
|---|---|
| Manufacturer | DEFA |
| Brand | Defa |
| Model | DEFA SmartCharge 8 |
| Item Model Number | 701785 |
| Manufacturer Part Number | 701785 |
| Product Dimensions | 23.5 x 9 x 5.4 cm |
| Item Weight | 780 g |
| Color | Black |
| Voltage | 12 Volt |
| Wattage | 132 watt |
| Amperage | 200 Ampere (Note: This likely refers to peak current or a related specification, not continuous charging output. The model name 'SmartCharge 8' suggests 8 Amperes charging current.) |
| Special Features | Inverter compressor (Note: This feature description seems generic and may not directly apply to a battery charger.) |
| Connectivity Technology | USB (Note: This might refer to an internal diagnostic port or a general category, as the primary connection is via battery clamps.) |
| Included Components | DEFA SmartCharge 8 incl. battery clamps |
| Complies with Specification | EFB, IP65 |
| Assembly Required | No |
| Guaranteed Software Updates Until | Unknown |
| Date First Available | January 15, 2020 |

Figure 10.1: Bottom view of the DEFA SmartCharge 8, displaying the power plug and product specification label.
11. Warranty and Support
For warranty information and technical support, please refer to the official DEFA website or contact your local DEFA distributor. Keep your purchase receipt as proof of purchase for warranty claims.
For further assistance, you may contact DEFA customer service directly. Contact details can typically be found on the manufacturer's official website.





