LR44
$ 2.00
LR44: 1.5 volt alkaline button battery. Size is 11.2mm dia x 5.2mm tall. X-ref part #s are CR44, SR44, 357, SR44W, AG13, G13, A76, A-76, PX76, 675, 1166a, LR44H, V13GA, GP76A, L1154, RW82B, EPX76, 303, SR44, S303, S357, SP303, SR44SW.
Also available as 10-pack. (item # 10-LR44)