Preppers 12 volt battery hack

Preppers 12 volt battery hack by John Milandred The cost of batteries varies as much as the size, shape and voltage of the batteries themselves. When the battery in your garage door opener needs replaced, you can purchase Energizer's A23 battery for an average cost of $2.00. Now let's look at the cost of the LR932 batteries which have an average cost of $5.00 each!