Hi, I'm looking for a way to find out how long my Surface 3 is lasting on battery. BatteryBarPro doesn't give that info, nor does BatteryMon (unless you leave it running and don't reboot). I can't find something that will give me just the amount of time it's been on battery. I've done a battery report in powercfg, short of adding up everything this doesn't tell me either. Any suggestions? as a bonus, 'screen on time' would be nice too.