Battery Type1.2 V Ni-MH 2/3AAA 300 MAh Rechargeable Battery Low self-discharge:Embedded sealed structure enlarges the lattice space,AAA2/3 size batteries retain 75% of their charge after 3 years -4 to 140:Rechargeable NiMH 2/3AAA 300 mah batteries is better high-temperature performance than other types of batteries, can be used from -4 to 140, and can be charged from the sun even in the snow Widely used:2/3aaa rechargeable batteries for solar lights,outside solar garden lights,solar,lawn,lamp,flashlight,emergency lamp,digital camera,grass cutter,portable video,remote control,toy,doorbells,MP3/MP4 player,electric razor Attention:This is a 2/3AAA battery and not a AAA battery, the only difference between them is the height, same diameter but 2/3 height of AAA battery2/3 AAA Battery size is 0.39 x 1.18 inch (10 x 30 mm)