Disposable Battery, Alkaline 1.5V
From Amazon
AA Battery GP Alkaline Super 1.5 V Pack of 4
Conrad Electronic
GP Batteries Super AA battery Alkali-manganese 1.5 V 4 pc(s)
Compadvance
GP Batteries Super Alkaline Aa/Lr6
OnBuy
SUPER ALKALINE AA/LR6 BATTERY