With a life span of up to 1000 charges, this 4 pack of rechargeable 550mAh AAA batteries are a simple and reliable source of power for your everyday devices. Their long shelf life means they are always around when you need them with 80% energy retention after 1 year.The rechargeable hybrid technology (nickel-metal hydride) allows for less waste than with standard disposable alkaline batteries. Please note the charging device is sold separately.The batteries contain 0% of harmful metals cadmium and mercury. Each battery casing prevents leakage to protect your family's devices and is made up of anti-corrosion components.Package Includes:4 x AAA 550mAh Rechargeable Batteries Features: 4 PACK AAA: With easy open packaging for your convenience, the 4 pack of AAA size batteries have a capacity of 550mAh. Charging device sold separately UNIVERSAL SIZE: AAA batteries are suitable for many devices including cordless phones, remote controls, solar lights and much more RECHARGEABLE: The rechargea