The USB Rechargeable Batteries are perfect for powering your electronic devices. Whether you have an electric toothbrush, massager, flashlight, radio, small fan, electronic toy, or any other electronic product, this battery will ensure you have a reliable and long-lasting source of power. The Li-ion battery has a nominal capacity of 1800mWh and a rated voltage of 1.5V. The best part is that it is rechargeable and can be recharged more than 1000 times with a recharging current of 1A and a charging voltage of 5V. The battery also features an output voltage of 1.5V and a charging indicator light. The red light flashes when charging and remains on when fully charged. Keep your devices powered and ready to use with these convenient AA USB Rechargeable Batteries.