For many users, the iOS devices battery life is short, and there is lot of battery doctor App,They says : the application will keep you battery life longer, actually they're not even help you battery, but he will not stop detect your current power, unnecessary loss, fever and even the phone
Don't let your iOS device work on a High Temperatures or low temperatures, bacause the battery life will be short
Second, if the charge is lost, you can temporarily use a computer USB port to charge the iphone. Computer has its own power management system, so by USB charging port is safer, but that wasn't a good idea too, bacause the power is not the same AV,
The correct charging method:
This is the best way to keep the battery activity: proved at a higher operating voltage (note, not too high), longer life lithium battery, mild discharge will achieve the best results, try not to when a low battery begins to charge again, not to have automatic shutdown after charging, the battery Apple cycles given is 500 times (= 100% of the number of cycles of charge and discharge, such as from 0% to 100% use refilled to 100%, from 60% to 40% and then used to charge 60% only 1/5 cycle, of course, this is an average is not every time you run out of battery after punching to ensure higher than after 500 the original 80%), which can almost guarantee you a perfect time for 2 years, also in line with apple and set by the operator contract period.
These may not be well understood, usually use this method as long as you can remember, and used with the charge, do not wait for the low battery warning, let iphone always maintain a healthy state it, note that these methods and conventional nickel-metal hydride nickel-cadmium battery has a very big difference, do not use the old method for many years to treat lithium batteries.
Try not to use non-original charger or charging head