Watch Battery CR2320 - Renata is a lithium 3V battery.
It measures 23 x 2.0mm. Capacity 150 mAh.
Renata Switzerland is a leading manufacturer of premium button cells for watches and many electronic products.
Interchange: Energizer BR2320, Maxell CR/BR2320, Varta CR2320, Rayovac BR2320, Citizen 280-201, I.E.C CR/BR2320