A 48 volt battery’s capacity is measured in amp-hours (Ah). A battery’s Ah is the amount of energy that it can store. A 36-amp hour battery with one Ah can provide enough power for about 100 hours. If you’re using a battery for a variety of purposes, such as to charge your electric scooter, it’s a good idea to compare the C-rated capacity of different batteries. C-20 ratings are the best rating to help you compare C-rated battery capacities.