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, 4 Bank charger with selectable output on the (3)12v Banks for Lead Acid/AGM/ Lithium. The 36v Bank is for Lithium Only!. All 4 banks are rated at a 10a charging rate.