Impulse Lithiums Onboard Charger is a simple solution when making the change to an Entire Lithium System or just a Lithium Trolling System. Waterproof rated, 3 Bank charger with selectable output on the (2)12v Banks for Lead Acid/AGM/ Lithium. The 36v Bank is for Lithium Only!. All 3 banks are rated at a 10a charging rate. Dimensions (14 1/2 x 9 3/4 x 3 3/4)