should i let my iphone battery run down before charging
1 Do not fully charge or fully discharge your deviceâs battery â charge it to around 50%. 2  If you store a device when its battery is fully discharged, the battery could fall into a deep discharge state, which renders it incapable of holding a charge. Do not fully charge or fully discharge your deviceâs battery â charge it to around 50%. 2  If you store a device when its battery is fully discharged, the battery could fall into a deep discharge state, which renders it incapable of holding a charge.