CR battery, lithium manganese dioxide

Nominal voltage: 3V non-rechargeable

Nominal capacity: 12 to 22000 mAh

Package shape: button cell, cylindrical, prismatic (CP type)
 
The 3V battery has double the voltage of conventional dry batteries. Features include: a stable, reliable discharge voltage; excellent storage characteristics; a low self-discharge rate of less than 2 percent; a long shelf life; excellent fast pulse discharge characteristics; a wide operating temperature range.

These batteries are used in computer mainboards, car alarms, calculators, watches, shoe lights, electronic thermometers, electronic toys, flashlights, medical instruments, small electronic gifts, Bluetooth wireless products, remote controls, MP3s, electronic keys, digital cameras, mobile phones, and can be used in many other product applications.

Link to CTECHI CR battery