6-dzm-20, 6-fm-20 12 volt 22 a/h (@20hr rate) booster pack / winch pack battery - recessed terminals (agm)1 X SP12 20 DZM (1 Battery will be Supplied) DESIGNED SPECIFICALLY FOR HIGH DRAIN DEVICES SUCH AS BOOSTER PACKS AND JUMP START UNITS, ALSO IDEAL FOR PORTABLE WINCH'S > What does @20Hr Rate mean? A few years ago when you decided to purchase an automobile, there would be a sticker on the window which might have read 45 mpg. Of course everyone knew that the only way to make that car get 45 miles to the gallon was to drive at 25 miles per hour on a brand