AG5 : 1.5v alkaline battery (SR754SW, V309, S754S, SG5, AG5, 70T, SR48, 309)
$ 2.50
AG5 (LR754) : 1.5 volt alkaline button battery. Replaces AG5, SR754SW, V309, S754S, SG5, AG5, 70T, 309, SR48, 393, Orange Tab/13 (Hearing aid battery part #). Battery dimensions: 7.9mm diameter x 5.4mm tall.
Pricing is per cell. Picture shows three visual aspects of the battery.