LR54 Button Cell is a button shape alkaline battery with a nominal voltage of 1.5V. The LR54 Button Cell is a 1.5V alkaline button cell battery and a suitable replacement for Energizer LR54 Battery. This alkaline battery is used for small electronic devices. It is a popular Alkaline button cell battery commonly used in cameras, calculators, toys, and watches. If your application is a toy, calculator, scales or other non-precision electronic device, order the Vinnic L1131. LR54 Button Cell is a suitable substiute for the MR54. The MR54 is a Mercuric-Oxide cell of the same dimensions. The MR54 cells are no longer manufactured because of their toxicity. If you to replace a MR54 for your device, you may consider using this Alkaline button cell battery instead.