Bolt Energy 51V 105AH Square Heated Lithium Battery51. 2V 105Ah Square Battery Heated Battery Specifications: Heated batteries warm themselves as they start to charge, and once they hit around 34 degrees, they start charging normally The heating system only runs when the battery is under the charging temperature and will automatically shut off once the proper temperature is reached The battery can charge in unheated places such as garages, barns and even outdoors The heating system only activates