Varta V12GA LR43 on a 1.5V alkaline battery with a capacity of 120mAh. It is an ideal choice for small devices that require a small but efficient power source. This type of battery is commonly used in small electronic devices such as watches, calculators, and some medical devices. Varta V12GA LR43 on a 1.5V alkaline battery with a capacity of 120mAh. It is an ideal choice for small devices that require a small but efficient power source. This type of battery is commonly used in small electronic devices such as watches, calculators, and some medical devices.