A review of battery energy storage systems and advanced battery
The specific energy of a fully charged lead-acid battery ranges from 20 to 40 Wh/kg. The inclusion of lead and acid in a battery means that it is not a sustainable technology. While it has a few downsides, it''s inexpensive to produce (about 100 USD/kWh), so it''s a good fit for low-powered, small-scale vehicles .