A:Answer Hello! ION Audio Batteries are Sealed Lead-Acid Batteries. Rechargeable lead-acid batteries are the same type used in automobiles. As with your car battery, how you use this battery has a significant impact on its lifespan. For example, if you forget to turn off your car's lights and drain the battery, a jump start may work a few times. But after a few full discharges, even a jump won't help, and the battery will need to be replaced. To purchase a replacement battery, please call our parts department at (401) 658-5766 x 1407, or go to our website at https://www.ionaudio.com/products/parts-and-accessories/batteries