Button Cell Battery, 27mAh, Silver Oxide 1.55V
From Amazon
varta, varta V396 two Battery SR726W
Conrad Electronic
Varta Button cell SR59, SR726 1.55 V 1 pc(s) 32 mAh Silver oxide SILVER Coin V396/SR59 NaBli 1
BatteryUpgrade
Varta V396 / V397 / SR59 Coin cell battery (Amount 1)