The Energizer AA rechargeable universal batteries are a convenient and environmentally friendly power solution for various devices. With a capacity of 1300 mAh, these NiMH batteries offer reliable performance and long-lasting energy for high drain devices. Pre-charged and ready to use, these batteries are rechargeable, making them a cost-effective choice for everyday use. With a voltage of 1.2V and a chemical composition of NiMH, these LR6 batteries are ideal for powering a range of sound and vision devices. This pack of 4 batteries ensures that you always have a reliable power source at hand.