With iOS, it is possible to manage your deviceвЂ™s battery pack life, because you can see the proportion of the battery pack utilized by each app (unless the device is charging you). To see your use, head to Settings > Battery.
Here you will find the messages you may see given just below the apps youвЂ™ve been utilizing:
Plug in and energy on your pc to charge your unit.
Ensure that your computer is connected in and driven on when youвЂ™re deploying it to charge your iOS unit via USB. If the unit is attached to a computer that is switched off or perhaps is in rest or standby mode, your deviceвЂ™s battery may empty. Note that iPhone 3G and apple iphone can not be faced with a FireWire power adapter or FireWire-based vehicle charger.