This CTEK will charge batteries with outputs of 1-32 amps per hour (AH), and maintain up to 60AH units. It's smaller and lighter than the maker's 36, and has fewer bells and whistles, but the design is similar. Performance was impressive, with the 800 reviving our dead battery at 7.6V and charging at a steady 0.8A. While not as good as its big brother, it's on a par with the Airflow and Accumate - albeit with a more limited range.