Introduction
Thank you for choosing the Amazon Basics Rechargeable Battery Charger. This manual provides essential information for the safe and efficient operation of your new charger. This unit is designed to recharge 2 or 4 AA or AAA Nickel-Metal Hydride (NiMH) batteries and features a convenient USB charging port for other devices.
Safety Information
- Read all instructions before use.
- This charger is designed for NiMH AA and AAA rechargeable batteries only. Never attempt to charge non-rechargeable batteries, as this may lead to explosion, rupture, or leakage, causing personal injury or property damage.
- Always insert batteries with correct polarity (+/-). Incorrect insertion can cause damage to the charger or batteries.
- Batteries must be charged in pairs (2 or 4 batteries at a time).
- Do not disassemble, modify, or short-circuit the charger or batteries.
- Keep the charger away from water, moisture, and extreme temperatures.
- Unplug the charger from the power outlet when not in use or before cleaning.
- Ensure proper ventilation during charging. Do not cover the charger.
- The charger features wrong polarity protection and a cut-off function to prevent overcharging.
Package Contents
- 1 x Amazon Basics 4-hour Ni-MH Battery Charger for AA and AAA rechargeable batteries
Setup
- Unfold the AC Plug: Locate the foldable AC plug on the back of the charger and flip it out.
- Insert Batteries: Open the battery compartment. Insert 2 or 4 AA or AAA NiMH rechargeable batteries into the designated slots, ensuring correct polarity (+/-). Batteries must be inserted in pairs.
- Plug into Power Outlet: Plug the charger directly into a standard AC wall outlet (100-240V).


Operating Instructions
Charging Batteries
Once plugged in with batteries inserted, the charger will automatically begin charging. The indicator lights at the bottom of each pair of battery slots will illuminate red to indicate that charging is in progress. When the batteries are fully charged, the indicator lights will turn green. The charging process typically takes approximately 4 hours, depending on the battery capacity and charge level.

Using the USB Charging Port
The charger includes a USB port (maximum output 500 mA) on its side, allowing you to charge a smartphone, iPod, or other handheld USB-powered device simultaneously with your batteries. Simply connect your device's USB charging cable to the USB port on the charger.

Maintenance
- Clean the charger with a dry, soft cloth. Do not use abrasive cleaners or solvents.
- Store the charger in a cool, dry place when not in use.
- Avoid dropping the charger or subjecting it to strong impacts.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Indicator lights not illuminating. | Charger not plugged in, batteries incorrectly inserted, or batteries already fully charged. | Ensure charger is securely plugged into a live outlet. Check battery polarity. If batteries are already charged, lights will be green or off. |
| Batteries not charging. | Non-rechargeable batteries inserted, batteries not inserted in pairs, or faulty batteries. | Only use NiMH rechargeable batteries. Ensure 2 or 4 batteries are inserted. Replace old or damaged batteries. |
| USB device not charging. | USB cable faulty, device requires more than 500mA, or charger is not powered. | Try a different USB cable. Check device's power requirements. Ensure charger is plugged into an AC outlet. |
Specifications
| Feature | Detail |
|---|---|
| Product Dimensions | 4.5 x 2.75 x 1.5 inches (LxWxH) |
| Item Weight | 3.68 ounces (104.32 Grams) |
| Output Voltage | 1.2 Volts |
| Battery Compatibility | AA & AAA NiMH rechargeable batteries |
| USB Output | Maximum 500 mA |
| Power Input | 100 to 240 AC (Worldwide Use) |
| Model Number | V-3299USB |
Warranty and Support
For warranty information and customer support, please refer to the Amazon Basics official website or contact Amazon customer service directly. Keep your purchase receipt for any warranty claims.





