1. Introduction
Thank you for choosing the Doublepow Rechargeable AA Lithium Batteries and 4-Bay Individual Battery Charger. This product provides a reliable and efficient power solution for your electronic devices. This manual will guide you through the setup, operation, and maintenance of your new battery and charger system to ensure optimal performance and longevity.

Image 1.1: The Doublepow 4-Bay Individual Battery Charger with eight 1.5V AA Lithium Batteries.
2. Product Features
- Rechargeable AA Lithium Batteries: Upgraded high-density lithium polymer batteries offering longer lasting power compared to other same capacity batteries. Ideal for household electrical devices such as wireless mice, cameras, electric toys, remote-controlled toys, flashlights, bathroom scales, and medical devices.
- 1.5V Constant Voltage Output: These AA lithium batteries provide a continuous and stable 1.5V voltage output throughout their discharge cycle until fully depleted, making them suitable for devices with high power requirements.
- 4-Bay Individual Battery Charger: The charger features four independent battery bays, allowing simultaneous charging of AA or AAA lithium batteries. It supports mixed charging of both AA and AAA lithium batteries for convenience.
- USB Input Design: Easy to charge by plugging the included charging cable into any adapter with a USB port, such as a laptop, power bank, or wall adapter (adapter not included). The other end connects to the Type-C port on the charger.
- Fast Charging: With an input voltage of DC 5V/2A and an output of DC 5V/500mA, the charger provides fast charging for 1.5V AA/AAA lithium batteries. Charging automatically stops when batteries are fully charged, indicated by the relevant battery icon remaining bright.
- Security Protection: Built-in protections include over-current, over-voltage, over-charge, over-power, and short-circuit protection to ensure safe charging and usage.
- Wide Application: Suitable for a broad range of devices including children's toys, microphones, electric shavers, remote controls, game handles, calculators, alarm clocks, and computer mice.

Image 2.1: A single Doublepow AA Lithium Battery highlighting its 2775mWh capacity for long-lasting performance.

Image 2.2: A graph illustrating the stable 1.5V constant voltage output of Doublepow lithium batteries compared to the declining voltage of general Ni-MH batteries.

Image 2.3: The 4-Slot LCD Charger displaying indicators for charging and fully charged states, along with various input options.

Image 2.4: The Doublepow charger demonstrating its versatile USB input design, compatible with various power sources.

Image 2.5: A visual representation of the multiple security protection features integrated into the Doublepow charger.

Image 2.6: An illustration depicting the wide range of devices that can be powered by Doublepow rechargeable batteries.
3. Setup and Installation
3.1 Battery Insertion into Devices
To power your devices, ensure the Doublepow AA lithium batteries are fully charged. Open the battery compartment of your device and insert the batteries according to the polarity indicators (+ and -). Close the compartment securely.
Video 3.1: This video demonstrates the proper insertion of Doublepow AA lithium batteries into various electronic devices, such as toys, highlighting their broad compatibility.
3.2 Charger Connection
Connect the provided USB charging cable to the Type-C input port on the Doublepow 4-Bay Charger. Plug the USB-A end of the cable into a compatible power source (e.g., a USB wall adapter, computer USB port, or power bank). The charger's LCD screen will activate.
4. Operating Instructions
4.1 Charging Batteries
- Insert the Doublepow 1.5V AA or AAA lithium batteries into the individual charging bays, ensuring correct polarity.
- Once inserted, the LCD screen on the charger will display the charging status for each battery. A flashing battery icon indicates charging in progress.
- When a battery is fully charged, its corresponding icon on the LCD screen will stop flashing and remain solid. The charger will automatically cease output to that bay.
- Remove batteries from the charger once fully charged.

Image 4.1: The Doublepow charger with batteries inserted, displaying their charging status on the LCD screen.
Important Note on Battery Compatibility:
The Doublepow lithium battery charger is designed exclusively for Doublepow 1.5V AA/AAA lithium batteries. Do not attempt to charge 1.5V lithium batteries from other brands or batteries made of other materials (e.g., Ni-MH, Ni-Cd) with this charger. Doing so may cause damage to the batteries or the charger, and could pose a safety risk.

Image 4.2: A crucial note emphasizing that the charger is exclusively for Doublepow 1.5V AA/AAA lithium batteries and should not be used with other battery types or brands.
5. Maintenance
- Cleaning: Use a soft, dry cloth to clean the charger and batteries. Do not use liquid cleaners or solvents.
- Storage: Store batteries and charger in a cool, dry place away from direct sunlight and extreme temperatures. For long-term storage, it is recommended to charge batteries to about 50% capacity.
- Battery Care: Avoid fully discharging batteries frequently to prolong their lifespan. Do not expose batteries to water or fire.

Image 5.1: An internal view of a Doublepow battery, illustrating its anti-leakage ring and smart control chip for enhanced safety and durability.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Batteries not charging | Incorrect battery type; Loose connection; Faulty cable/adapter; Charger malfunction. | Ensure only Doublepow 1.5V AA/AAA lithium batteries are used. Check USB cable and adapter connections. Try a different USB port or adapter. Contact customer support if issue persists. |
| Device not powering on with charged batteries | Incorrect battery insertion; Device specific issue; Battery not fully charged. | Verify battery polarity in the device. Ensure batteries are fully charged (solid icon on charger). Test batteries in another compatible device. |
| Charger LCD not displaying | No power supply; Faulty cable/adapter. | Ensure the USB cable is securely connected to both the charger and a working power source. Try a different USB cable or power adapter. |
7. Specifications
- Battery Type: 1.5V AA Lithium (Rechargeable)
- Charger Input: DC 5V/2A
- Charger Output: DC 5V/500mA (per bay)
- Max Output Power: 100W
- Package Dimensions: 5.16 x 5 x 1.73 inches
- Item Weight: 9.1 ounces (0.26 Kilograms)
- Color: White, Blue, Black
- Manufacturer: Doublepow
- Country of Origin: China
8. Safety Information
- Do not disassemble, crush, or puncture the batteries or charger.
- Do not expose to high temperatures or direct sunlight.
- Keep out of reach of children and pets.
- Dispose of batteries and charger responsibly according to local regulations.
- Do not short-circuit the batteries.
9. Warranty and Support
Doublepow products are manufactured to high-quality standards. For any questions, concerns, or warranty claims, please contact Doublepow customer support through the retailer's platform or the official Doublepow website. Please have your purchase details and product model number ready for faster assistance.





