Duracell Silver Oxide D377/SR626, 1 Battery in a Pack This 1.5-volt silver oxide battery is primarily used to power watches, thermometers, handheld games and calculators. Also known as: Bulova 606, Citizen 280-39, D377, 565, BA, Seiko SB-AW, SR626, SR626SW, GP377, SR66, V377.