LR44 Batteries. 2 per package
LR44 Batteries. 2 per package at HorticultureSource.com -
ALKALINE BUTTON BATTERY 1.5-volt 2 pack by Maxell. A standard battery used in many meters and cameras. Reference numbers LR44 and A76. Fits most Hanna, Adwa, Milwaukie, Oakton and more.