Should I Drain My Iphone Battery Before First Charge. Theres no absolute rules to follow. Apple lithium-ion batteries work in charge cycles.
A normal battery is designed to retain up to 80 of its original capacity at 500 complete charge. This behavior may have been true in the era of nickel batteries however you need not resort to such practice for todays lithium-ion batteries. In case the phone is turned off the battery should be recharged as soon as possible.
Charge your Apple lithium-ion battery whenever you want.
2Use your device until it shuts off due to low battery. You might need to search the power source everywhere you go in order to recharge your iPhone. Li-on batteries DO NOT REQUIRE a complete cycles dont let your iphone DIE in perfect world AT ALL TIMES. Dont let your phone stay at 100 level for too long ie plugging to charger after fully charged.
