Renata Watch Battery 309 is a silver oxide low drain battery 1.55 V. Watch Battery 309 measures 7.9X5.4mm. This battery is mercury free and has a capacity of 80 mAh. Renata Switzerland is a leading manufacturer of premium button cells for watches and many electronic products.

Interchange: Energizer 309, Maxell SR45SW, Varta V309, Rayovac 309, Duracell D309/393, I.E.C SR754 (SR48).