1. Introduction
The XTAR LC12 Battery Charging Case is specifically designed for 1.5V AA/AAA Li-ion batteries. This versatile device combines charging and storage functionalities, allowing you to charge up to 8 AA and 4 AAA 1.5V Li-ion batteries simultaneously. It features a magnetic flip cover for convenient battery access, built-in LED indicators for real-time charging status, and a universal Type-C input port for broad compatibility with power sources.
The kit includes high-capacity 1.5V Li-ion batteries, offering stable 1.5V output from full to empty, making them ideal for high-drain devices. The charger provides three distinct charging modes and incorporates comprehensive protection features for both the charger and the batteries.
2. Package Contents
The XTAR LC12 Kit is available in two configurations:
- Kit 1: LC12 Charger + 8× AA 1.5V 3600mWh Li-ion Batteries.
- Kit 2: LC12 Charger + 8× AA 1.5V 3600mWh Li-ion Batteries + 4× AAA 1.5V 1200mWh Li-ion Batteries.
Both kits typically include:
- XTAR LC12 Battery Charging Case
- USB Type-C Charging Cable
- User Manual
- XTAR 1.5V Li-ion AA Batteries (quantity as per kit)
- XTAR 1.5V Li-ion AAA Batteries (quantity as per kit, if Kit 2)

3. Specifications
3.1. LC12 Charger
| Feature | Specification |
|---|---|
| Input | 5V-2A (USB Type-C) |
| Compatible Battery Types | XTAR 1.5V Li-ion AA/AAA |
| Charging Slots | 12 independent slots (8x AA, 4x AAA) |
| Constant Current Charging | 0.5A x 4 Max |
| Working Temperature | -10°C to 40°C |
| Dimensions | 105mm (L) x 67mm (W) x 52mm (H) (approx.) |
3.2. XTAR 1.5V Li-ion AA Battery
| Feature | Specification |
|---|---|
| Model | AA 1.5V 3600mWh Li-ion battery |
| Energy | 3600mWh (approx. 2200mAh) |
| Nominal Voltage | 1.5V |
| Maximum Discharge Current | 2.5A |
| Cycle Life | ≥ 1200 times |
| Protection | Built-in (Over-charge, Over-discharge, Short-circuit, etc.) |
| Operating Temperature (Discharging) | -20°C to 55°C |
3.3. XTAR 1.5V Li-ion AAA Battery
| Feature | Specification |
|---|---|
| Model | AAA 1.5V 1200mWh Li-ion battery |
| Energy | 1200mWh (approx. 750mAh) |
| Nominal Voltage | 1.5V |
| Maximum Discharge Current | 1.5A (0~40°C) |
| Cycle Life | ≥ 1200 times |
| Positive Pole | Button Top |
| Size | Ø10.3±0.3mm×H44.5±0.5mm |
| Net Weight | 9g |
| Protection | Built-in (Over-charge, Over-discharge, Short-circuit, etc.) |
| Operating Temperature (Discharging) | -20°C to 55°C |


4. Safety Warnings
Failure to follow these safety instructions may result in fire, electric shock, injury, or damage to the product and property.
- Do not charge non-XTAR 1.5V Li-ion batteries. Using other batteries may cause damage to both the batteries and the charger.
- Do not charge batteries that are leaking, swollen, damaged, discolored, or deformed.
- Do not use the charger in direct sunlight, damp, or heavily dusty environments.
- Do not disassemble or modify the charger. Do not use the charger if it is damaged.
- Minors must use the charger under adult supervision.
- The charger must only be used with a 5V 2A or higher power adapter. Insufficient power will cause malfunction.
4.1. Insufficient Power Adapter Output Warnings:
- The adapter may overheat.
- Empty slots may be falsely detected as occupied, and batteries may be incorrectly detected as fully charged.
- In severe cases, the charger may repeatedly restart.
- In slow-charge mode, the indicator lights may intermittently brighten and dim.
5. Setup
- Connect Power: Connect the provided USB Type-C cable to the charger's input port and to a 5V 2A (or higher) power adapter.
- Initial Display: Upon power connection, all LED indicators will briefly turn red, then green, and finally enter standby mode (indicators off for empty slots).
- Insert Batteries: Open the magnetic flip cover. Insert XTAR 1.5V Li-ion AA or AAA batteries into the appropriate slots, ensuring correct polarity (+ to +, - to -). The charger features a tilt-design for effortless battery access.
- Close Cover: Close the magnetic flip cover.

6. Operating Instructions
6.1. Charging Function
The LC12 Battery Charging Case is equipped with 12 independent charging slots, allowing for simultaneous charging of up to 8 AA and 4 AAA 1.5V Li-ion batteries. The order of inserting batteries and connecting power does not affect the normal operation of the charger.
6.2. Toggle Switch (Charging Modes)
The charger features a three-position toggle switch on the side, allowing you to select different charging modes based on your needs:
- Left Position (Left-Priority Fast Charge): The charger automatically prioritizes and charges batteries from left to right in fast-charge mode.
- Center Position (Slow Charge): This mode provides a slow charge for all 12 batteries, rotating the charge among 4 batteries at a time, every 10 seconds.
- Right Position (Right-Priority Fast Charge): The charger automatically prioritizes and charges batteries from right to left in fast-charge mode.

6.3. Charging Status Indicator
Each charging slot has an independent LED indicator to display the battery status:
- Startup Display: After power is connected, all indicators turn red then green in sequence, then enter standby mode.
- No Battery: Indicator is off.
- Charging: Red light stays on.
- Fully Charged: Green light stays on.
- Waiting to Charge: Yellow light stays on.
- Error Warning: If an incompatible rechargeable battery, reverse polarity, or activation failure is detected, the red indicator will flash rapidly. Stop charging immediately and check the battery type and installation before retrying.

6.4. Activation Function
The LC12 charger features an activation function that can effectively revive over-discharged batteries. This allows them to be recharged and used again, thereby extending their overall lifespan.

7. Maintenance
- Keep the charger and batteries clean and dry. Avoid exposure to liquids or excessive moisture.
- Store the charger and batteries in a cool, dry place away from direct sunlight and extreme temperatures. The LC12 case is designed to function as a storage solution for your batteries.
- Do not attempt to clean the charger with abrasive materials or harsh chemicals. Use a soft, dry cloth.
- Regularly inspect the USB-C cable for any signs of damage.


8. Troubleshooting
8.1. Charger Malfunctions / Irregular Behavior
If the power adapter output is insufficient (less than 5V 2A), the following problems may occur:
- The adapter may overheat.
- Empty slots may be falsely detected as occupied, and batteries may be incorrectly detected as fully charged.
- In severe cases, the charger may repeatedly restart.
- In slow-charge mode, the indicator lights may intermittently brighten and dim.
Solution: Ensure you are using a 5V 2A or higher power adapter.
8.2. Red Indicator Flashing Rapidly (Error Warning)
This indicates an incompatible rechargeable battery, reverse polarity, or activation failure.
Solution: Immediately stop charging. Check the battery type to ensure it is an XTAR 1.5V Li-ion battery. Verify that the battery is inserted with correct polarity. If the issue persists, the battery might be faulty or severely damaged.
9. User Tips
- The LC12 charger doubles as a convenient storage case, allowing you to store and charge your batteries simultaneously.
- Utilize the toggle switch to prioritize charging for specific groups of batteries. This can help manage heat distribution, especially when charging a full load of batteries.
- For optimal performance and to prevent issues, always use a powerful charger with at least 5V 2A output, especially when charging all 12 slots concurrently. Some warmth from the charger during full load is normal.
10. Warranty & Support
For after-sales service, please provide the product with its warranty number and receipt.
- 15-Day Free Replacement: Eligible for product defects within 15 days of purchase.
- 12-Month Free Warranty: Covers manufacturing defects for 12 months. Repairs beyond this period may require payment for parts and shipping.
- Lifetime Technical Support: XTAR provides ongoing technical assistance for the product's lifetime.
Important Note:
- Malfunctions caused by failure to follow this manual or improper storage are not eligible for replacement or warranty service.
- For after-sales inquiries, please contact the official service email: service@xtar.cc.
A PDF version of this user manual is available for download from the official XTAR website or by referencing the provided media URL: User Manual (PDF).
11. Anti-Counterfeit Verification
To verify the authenticity of your XTAR product, follow these steps:
- Locate the Anti-Counterfeit Code: The 18-digit anti-counterfeit code is located either on the back shell of the product or on the outer packaging box. Scratch it off carefully.
- Enter the Code Online: Visit the official XTAR website at www.xtar.cc. Navigate to the 'Contact Us' section and then to 'Anti-Counterfeit Query'. Enter your 18-digit code to verify.