Watch Battery CR2450N - Renata is a lithium 3V battery.
It measures 24.5 x 5.0mm. Capacity 540mAh.
Renata Switzerland is a leading manufacturer of premium button cells for watches and many electronic products.
Interchange: Energizer CR2450, Maxell CR2450, Varta CR2450, Duracell DL2450, I.E.C CR2450