Batteries, 8mAh, Silver Oxide 1.55V
From Amazon
VARTA 1934 V 337 Watch Cell Battery
Conrad Electronic
Varta Button cell 337 1.55 V 1 pc(s) 9 mAh Silver oxide SILVER Coin V337/SR416 NaBli 1
BatteryUpgrade
Varta V337 / SR62 / 337 Coin cell battery (Amount 1)