Originally Posted by
revchuck
This is how I got my SRM. Since it's on a non-racing bike, is there a downside to waiting until the battery dies to send it in? My race bike also has a power meter, so I can live without the SRM for a while if necessary.
Nope. Battery life depends a lot on age and the model. Newer models are a lot more efficient. I expect to get three years out of a battery set with mine.