Originally Posted by Trsnrtr

Both of my etap batteries died today. I was deliberately running them until death so I could get an idea of how long it would take. I alternate them every ride because I wanted to get an average of miles independent of front vs. rear.

They went 380 miles and died within 45 minutes of each other. Last 6 mi. of my ride were in a 17 mph gear at 95-100 rpm. Luckily, I was parked in the Illinois River valley and was mostly downhill to the car.

I think they are supposed to go longer according to SRAM and maybe they will after a few charges. Regardless, I'm going to charge them at ~300 miles from now on.