The positive terminal on this battery is flat, similar to the negative terminal on the bottom of the battery. This is best suited for building battery packs with these cells. Most alkaline, Ni-Cd, and Ni-MH batteries have a "button top"; meaning part of the positive terminal is raised up from the rest of the battery. Most devices require a button top to make a connection in the battery compartment. Please verify device can use flat top terminals before purchasing.