Originally Posted by
4eyedbuzzard
Lithium Ion batteries don't suffer from "charge memory" like NiCd or other rechargable battery technologies. The best thing for them is to operate them in a partial discharge to partial charge state - say drain to 30%, then charge to 80%. But only charging to 80% is impractical for most users. And real world, it's not going to matter a lot. The battery actually has capacity beyond what it charges up to and drains down to - the technology is such that manufacturers engineer the system to charge and discharge within a certain charge curve which is less than the true range of the battery. You'll likely charge it to 100% when you can, and probably never drain it completely (especially true as Li Ion have an internal cutout circuit when voltage falls below a certain level). Just use it a few times (charge the phone and recharge/run the pack down) prior to taking off to be sure it doesn't have any other flaws. Things like bad connectors are far more common problems than charge issues.