"Inside the insulated cask of the battery, the electromotive apparatus cracks the energy out of acid and converts it to electrical charge."
Lead-Acid Cells are inefficient power sources, weighing three times as much as normal cells when full but only holding 40% as many charges.
A Lead-Acid Cell is one of the various types of Energy Cells available in Caves of Qud.
As a liquid fueled energy cell, it produces power from Acid. Each dram of acid can produce 500 units of charge, and it can hold a maximum of 8 drams. A fully fueled cell can provide 4000 units of charge.