A27 batteryThe A27 battery is a dry cell-type battery used in some small remote controls and some cigarette lighters.DescriptionAn A27 battery is cylindrical, long and in diameter, with a typical weight of 4.4 grams, and a typical capacity around 20 mAh. It has a nominal voltage of 12 V. It is similar to the A23 battery, with almost the same length and the same nominal voltage, but thinner and made of eight LR732 button cells.