12V, 4A Switching Power Supply and Charger with
AV22 Battery Monitor Board - Controls charge and discahrge
AV22 keep the battery for longer life
by preventing total discharge
Full over voltage and overload protection
Suppplied in ABS or Metal box
Battery leads Included
Main voltage: 110-220V AC
Dimensions:  310 x 220 x 85 mm  (9” X 12 1/4” X 3 1/2”)

Click for details