... and long shelf life 3. All CR series durable button battery LiMnO2 3V button cell CR20321. Series: We sell many series of ... button cells, including CR series, LIR series, LR\ SR(AG) series. ... : The products are widely used in Cameras, Calculators, Car Security Alarm, Keyless Car Remotes, Organizers, Glucometer, Computer Equipment (memory backup battery ...