- Anytime the board has less than 50%, you should start taking aggressive things, like going up a hill at a pretty decent pace, more cautiously because when you lean forward the motor is going to have to pull (exponentially?) more from the batteries to hold you up, but to increase speed at an angle.
- Depending on how old the board is, the batteries might not hold as much juice as they used to, so they'll have a harder time going up hills
I had a V1 and was able to get to 24MPH on it once and can now only get to 17 max before teh motor starts giving out. The difference is that the 24MPH was when the board was still practically new, but now that I've added over a thousand miles to it, the batteries have definitely degraded.