377 Watch Battery 1.5V - Powerful and no mecury button battery
LR626 Watch Battery,20 Pack SR626SW LR66 AG4 377 1.5V Button Cell Wrist Watch Batteries (20 Pack) : Amazon.ca: Health & Personal Care
Factory Direct 1.55V 377 Sr626 Silver Oxide Button Cell Battery for Hearing Aid with CE and RoHS - China Watch Battery and Li Ion 18650 Battery price | Made-in-China.com
Button Cell Silver Oxide Battery by Duracell® DURD377BPK | OnTimeSupplies.com