SUPEREX&reg; 2 PCS 3v 400 mAh CR2 15270 Batteries + Car Charger Dual Rapid Rechargeable Battery Charger for 3V CR123A / CR2 Lithium Batteries The Charger works with Li-ion CR2 CR123 rechargeable batteries, and inclueds 4 of the CR2 type. End-of-charge voltage detection assures the safe and full charge any time MCU control with Short-circuit protection, Over voltage cut-off protection, Reverse polarity protection Complete individual channels, Constant current and voltage.CR2 battery Can be compatible with a variety of devices, such as flashes, remotes, flashlights, binoculars with digital read-outs, toys, games, and portable devices ,etc Battery reset, Bad/non-rechargeable battery test. Adaptor is randomly selected for shipping