This 4-pack of 1.2V Pro Rechargeable AA NiMH Batteries from Maha Powerex can power electronics with high energy requirements, such as digital cameras, flashes, medical devices, and other electronics. Each has a 2700mAh capacity, enabling it to provide a lot of power to high-drain gadgets in a short amount of time. The batteries are able to retain up to 75% of their initial charge after being stored for a year because of their extremely low self-discharge rate. They also operate memory-free, so you may charge them whenever you like and they won't experience a memory effect, which causes batteries to hold less charge.