Brand New Half Size AA Batteries 8pack Basic Info—3.6V non-rechargeable 1/2 AA size lithium thionyl chloride battery with AX solder tabs; 1200 mAh; 14.5*25mm/0.55*0.98 inch, wide range of temperatures -55°C to +85°C; most suitable for low power consumption devices. please check carefully if the ER14250 battery is the size you need for your electronic device before purchasing. Application- Slot machine, Chip board, Home automation sensors, door opening detector, temperature sensor, home alarm, bark collar, door sensor, remote control alarm, water meter, electricity meter, gas meter, medical equipment, flashlight, backup power etc.