All good advice
Lipo's are fickle things they do no not like to run down at all,,yup 3v-3.4 to be safe...
If you see any ,,ANY, drop off in performance stop immediately and recharge, lipo cutoff is a must saving many batts,,,,other wise you will deplete its life. it will puff up probably and soon die ,becoming unsafe to charge in the meantime......I should listen to my own advice Ive killed plenty $$$