Been through three batteries on mine. Measured each new and old battery upon removal and replacement. A new battery measure approximately 3.29v and the out of range/ battery dead seems to occur at 2.9v. To me that means you don't get much life on a new battery before you need to replace. Amazing that other vehicle remotes goes for years, are much more compact, and do much more than just turning on ignition. The remote fob for the Triumph is actually quite archaic.