1. Product Overview
The LiitoKala Lii-402 is a smart, universal 4-bay battery charger designed for various rechargeable battery types, including Li-ion (3.7V, 3.85V, 3.2V) and NiMH (1.2V). It features independent charging slots, flexible current selection, a clear LED power display, and built-in safety protections. Additionally, it offers a USB output function, allowing it to serve as a portable power bank.
2. Technical Specifications
| Feature | Specification |
|---|---|
| Input | Micro USB 5V/2A |
| Output Voltage (Li-ion) | 4.2V±0.05V (for 3.7V batteries), 3.85V±0.05V, 3.65V±0.05V (for 3.2V batteries) |
| Output Voltage (NiMH) | 1.48V±0.05V (for 1.2V batteries) |
| Charging Current | 500mA, 700mA, 1000mA, 2000mA (adjustable for slots 1-3, fixed 2000mA for slot 4) |
| Cut-off Current | <100mA |
| Standby Current | <15mA |
| USB Output | 5V/1A (4.75V–5.25V under load) |
| Dimensions | 116mm × 90mm × 30mm |
| Weight | 120g (with Type-C cable) |
| Compatible Battery Types | Li-ion: 10440, 14500, 16340 (RCR123), 17500, 17670, 18350, 18490, 18650, 20700, 21700, 26650 NiMH/Ni-Cd: AA, AAA, SC |
3. Setup
- Connect Power: Connect the provided Type-C cable to the charger's input port (IN: 5V/2A) and plug the other end into a 5V/2A USB power adapter (not included). The charger's LEDs will light up instantly.
- Power Adapter: Ensure your power adapter provides 5V/2A for optimal charging performance.
4. Operating Instructions
4.1. Charging Batteries
- Insert Battery: Place a rechargeable battery into any of the four independent charging slots, ensuring correct polarity (+/-).
- Automatic Detection: The charger will automatically detect the battery type (Li-ion or NiMH) and its voltage. The LEDs will flash, indicating the battery type setting.
- Select Battery Type (Li-ion only): For Li-ion batteries, if the detected voltage is not what you intend (e.g., 3.7V vs 3.85V), you can short press the 'MODE' button within 5 seconds of insertion to cycle through the Li-ion voltage options (3.2V, 3.7V, 3.85V). The NiMH 1.2V mode cannot be manually selected for other battery types.
- Select Charging Current: For slots 1-3, you can adjust the charging current by long pressing the 'MODE' button for 2 seconds to cycle through 500mA, 700mA, 1000mA, and 2000mA. Slot 4 is fixed at 2000mA for fast charging.
- Monitor Charging: The 4 LED indicators (25%, 50%, 75%, 100%) will show the real-time charging progress. When all 4 LEDs are solid, the battery is fully charged.
4.2. Using USB Output (Power Bank Function)
The Lii-402 can function as a portable power bank to charge external devices via its USB output port (OUT: 5V/1A).
- Insert Charged Battery: Ensure at least one fully charged Li-ion battery (e.g., 18650, 21700) is inserted into any slot.
- Connect Device: Plug your device's USB charging cable into the charger's USB output port.
- Start Charging: The charger will automatically begin supplying 5V/1A power to your device.
4.3. Video Demonstration
5. Maintenance
- Keep the charger clean and dry. Avoid exposure to moisture or extreme temperatures.
- Do not attempt to disassemble or modify the charger.
- Store the charger in a cool, dry place when not in use.
- Regularly check the charging slots and contacts for any debris or corrosion.
6. Troubleshooting
- Charger not powering on: Ensure the Type-C cable is securely connected to both the charger and a functional 5V/2A power adapter. Try a different cable or adapter.
- Battery not charging: Check battery polarity. Ensure the battery is compatible with the charger. If the battery is deeply discharged (0V), the charger has a 0V activation function, but some extremely low voltage batteries might not be recognized.
- LEDs flashing abnormally: This might indicate a faulty battery or an error. Remove the battery and reinsert it. If the issue persists, the battery might be damaged.
- USB output not working: Ensure a sufficiently charged Li-ion battery is inserted. The USB output requires power from an inserted battery.
7. Safety Information
⚠️ Please mind potential fire risk and strictly follow the instruction manual for charging and storage.
- Overcharge Protection: Automatically stops charging when batteries are full.
- Over-discharge Protection: Prevents batteries from being discharged too low when used as a power bank.
- Short Circuit Protection: Protects against short circuits.
- Reverse Polarity Protection: Prevents damage if batteries are inserted incorrectly.
- 0V Voltage Activation Function: Can activate deeply discharged batteries.
- Intelligent Identification of Bad Battery: Helps detect and prevent charging of damaged batteries.
- Indoor Use Only: This charger is designed for indoor use. Do not expose to rain or moisture.
- Do not charge non-rechargeable batteries.
- Keep out of reach of children.
8. User Tips
- For faster charging of a single battery, use slot 4 which provides a fixed 2000mA current.
- When using the USB output, ensure the inserted Li-ion battery has sufficient charge to power your external device effectively.
- Always double-check the battery type and voltage selection for Li-ion batteries to ensure proper charging and prevent damage.
- If you have multiple batteries to charge, consider using lower current settings (e.g., 500mA or 700mA) for a gentler charge, which can prolong battery life, especially for smaller capacity batteries.
9. Warranty and Support
This LiitoKala Lii-402 charger comes with a 1-Year Manufacturer Warranty, guaranteeing it against defects in materials and workmanship under normal use. Please retain your proof of purchase for warranty claims.
For technical support or warranty inquiries, please contact the seller or manufacturer directly.
