This CR-2 Rechargeable Lithium Battery from Watson has an output voltage of 3V and a capacity of 200mAh. It features excellent high-drain performance, making it free of memory effect, and will last for up to 1000 charge cycles. The battery is compatible with a variety of devices, including flashes, remotes, flashlights, binoculars with digital read-outs, toys, games, and portable devices.