Batteries, 6100mAh, Alkaline
From Amazon
VARTA Longlife Power 4.5V Block 3LR12 Alkaline Battery (1-pack) - Made in Germany
BatteryUpgrade
Varta Longlife Power 3LR12 / MN1203 Alkaline 4.5 Volt battery (Amount 1)
This product is also available at 1 unverified merchant.