What do I do if I have to store my batteries outside for winter?

VRLA batteries can be stored in sub-freezing temperatures as low as -25˚F—35˚F as long as they are fully charged prior to storage. The self-discharge rate of fully-charged batteries is very low in these conditions and they will not require charging for many months; however, if your VRLA batteries do freeze, they may not always recover. To attempt recovery bring them inside and let them sit until the temperature of the battery reaches the temperature of the room, Approx. 68˚F. Then charge the batteries normally. And hope for the best. You may have to cycle the battery a couple of times before making a decision on its final condition.