Why Your Dead iPhone Still Drains Battery

Your iPhone battery is constantly losing power right now, even if you turn it completely off. Lithium-ion batteries naturally lose 1 to 2 percent of their charge every month from silent chemical reactions. On top of that, a tiny internal circuit stays alive to track time and monitor the power button. Storing a dead or fully charged iPhone for months can permanently ruin the battery through deep discharge. The magic secret? Charge your phone to exactly 50 percent before turning it off and putting it away. Store it in a cool spot and refresh that charge every six months. It takes seconds to do, but it saves your spare device from becoming a useless brick.