If you notice that your device gets hot when you charge it, take it out of its case first.
For Apple Watch Edition models, make sure the cover of the magnetic charging case is off.
If you want to store your device long term, two key factors will affect the overall health of your battery: the environmental temperature and the percentage of charge on the battery when it’s powered down for storage.
Therefore, we recommend the following: Depending on how long you store your device, it may be in a low-battery state when you remove it from long-term storage.
“Battery life” is the amount of time your device runs before it needs to be recharged.
“Battery lifespan” is the amount of time your battery lasts until it needs to be replaced.
Charging your device when it’s inside certain styles of cases may generate excess heat, which can affect battery capacity.
You can still use key functions like making and receiving phone calls, email, and messages, accessing the Internet, and more.
And when your phone charges up again, Low Power Mode automatically switches off. This indicates that either you are in a poor cell coverage area and your i OS device is searching for a better signal or that you’ve used your device in low-signal conditions, which has affected your battery life.
Even storing a battery in a hot environment can damage it irreversibly.
When using your device in a very cold environment, you may notice a decrease in battery life, but this condition is temporary.
Note that i Phone 3G and i Phone 3GS cannot be charged with a Fire Wire power adapter or Fire Wire-based car charger.