Why doesn't my battery charger shut off in the 2-amp position when charging my vehicle or deep-cycle battery?

The 2-amp charge rate is intended for small batteries such as motorcycles, snowmobiles and lawn garden tractors. Consequently, when trying to charge a larger battery at that rate, it will take a very long time and the battery may discharge at a greater rate than the 2-amp charge can provide. It is best to charge at a higher charge rate like 6-amps, 10-amps or higher.