One Gesipa Rivet Gun Lithium Battery Powerbird/Accubird Rivet Guns One Gesipa Lithium Spare Battery for the Powerbird and Accubird Riveting Tools This 14 4V, 2 6 Ah Li-Ion Spare Battery Works With Either Tool and is Interchangeable with old Ni-Cad Batteries, however It Can Only Be Charged with a Li-Ion Charger