50% Discharges Best for Li-Ion Batteries
Posted January 12th, 2012 @ 10:58am by Erik J. Barzeski
So says LifeHacker. That's my typical usage pattern, and based on Apple's advice, I've been running batteries in my MacBook Air and iPhone to 0% once a month before recharging.
But, I did pick up one of the Belkin Conserve outlets, because I always plug my phone in at night when I sleep, so I'll just cut off the charge after half an hour or something now. I randomly plug the phone in to my computer during some days as well.