I reflashed my Oneplus One because for some reason it wouldn't boot into OS. It would just shut off after it boots.

Recovery was fine though. So thought it was a ROM issue, sideloaded the latest copy.

Still didn't work so as a last ditch effort I plugged it into the charger it.... figured i'd deal with it tonight.

Well now I turn it on again and it boots... Power bar says 71%....

Somehow it lost 40% power from just sitting on my desk a week unused.... or maybe i just remembered wrong. But still strange I could turn it on and even sideload from Recovery...