Button Cell Battery, 115mAh, Silver Oxide 1.55V
From Amazon
Varta SR 43 Watch Battery Button Cell Silver Oxide Battery
BatteryUpgrade
Varta SR43 / V386 / 386 Coin cell battery (Amount 1)
Conrad Electronic
Varta Button cell SR43, SR1142 1.55 V 1 pc(s) 115 mAh Silver oxide SILVER Coin V386/SR43 NaBli 1