Originally Posted by
protc3
If your at 7.8 volts, its not the battery. Sounds like a motor or speedo issue.. Being the speedo is so hot, i would focus on it. Maybe go through the settings on it and make sure nothing is funky.
7.8 at rest, but what was the voltage under load? If the batteries have gone flat, and the voltage is sagging the current draw will go up causing more heat. Either way something is up. Try one of your friends good packs and drive the same way. See what happens.