How to Charge a Deep Cycle Marine Battery (Step-by-Step)
For instance, a 10-amp charger will charge a 100Ah battery in about 10 hours. Battery Type: Lithium batteries generally charge faster than lead-acid batteries due to their superior efficiency. For lead-acid batteries, it typically takes between 8-12 hours to fully charge. Lithium batteries, on the other hand, may only require 4-6 hours.