The Energenie EG-BA-AAA8R4-01 is a set of four rechargeable AAA batteries designed for devices that require a steady and reliable power source. These Ni-MH cells offer a capacity of 850 mAh and a voltage of 1.2 V, coming ready-to-use so you can start using this 4 piece pack immediately after opening. Each AAA battery weighs 14 g and measures 10.5 mm by 44.5 mm, fitting standard slots while supporting at least 500 recharge cycles to reduce waste over time. Depending on your charger's current, they can be fully powered up in 2 to 6 hours. Because they are free from lead, cadmium, and mercury, these batteries provide a more environmentally conscious choice for powering your household electronics.