The all-new direct-mount onboard battery charger for an under-the-hood battery charging system and year-round battery maintenance. Securely mounts nearby the battery with its rugged snap-fit mounting bracket. Alters the charge to eliminate over-charging in hot climates and under-charging in cold climates. Charges dead batteries as low as 1-volt, including flooded, gel, and AGM, as well as automotive, marine, and deep-cycle batteries. Automatically repairs and reverses battery damage caused by sulfation and acid stratification to restore performance and extend battery life.