2 x Duracell LR54 Alkaline Batteries (2 Batteries) Quality DURACELL Brand that you can trust to last!This battery is also known by the following reference numbers - LR54, 189, 191, LR1130, AG10, RW89, D189, V10GA, 389 & 390.Best Before Use By Date 2028.Diameter 11.6mm x Height 3.05mm.