Keep your battery charged while driving with the REDARC BCDC1220. It’s a 12V, 20A, in-vehicle, multi-stage, DC to DC battery charger. It works with a wide operating range from 9-32V and allows you to charge from both 12V and 24V vehicle systems. The BCDC range charges your secondary battery banks to 100% state of charge while on the move. Multi-stage charging profile The unique charging profile for each battery type allows the maintenance of a 100% charge for your auxiliary battery. It charges AGM, gel, calcium content, VRLA and standard lead acid batteries. large capacity battery banks may require a few cycles to fully charge. Built tough for all conditions The In-vehicle Battery Charger has been proven to operate under extreme heat, up to 176°F, and eliminates the risk of dust or water getting into the unit. Additionally, the BCDC1220 holds up against the roughest types of terrain and even while crossing deep water. Bottom line: it will keep you on the road and powered up when you need it most. Need help? For help in choosing the best dual battery setup for your needs use the free REDARC dual battery selector.