Chosen Solution
Hi! I have an iPhone 5s which is not working (won’t connect to iTunes or power up, and it has a shattered screen). I don’t really have a desire to spend much money on fixing this phone so I am trying to do everything possible before ordering new parts. I suspect that the charging port/battery is defective. Therefore, I’ve been googling online to try and find a way to ‘boost’ the battery back to life. The simplest way I have found is to heat it up with a hair dryer then plug it back into the phone. I’m wondering, would this be safe and is there any other method/thing I should do to troubleshoot/fix the phone (without ordering new parts).
@imadknight no it is not nor will it work. The battery is most lightly depleted below its charging threshold. Sometimes you can wake-up the battery. For that use a 9V PP3 battery. Attach positive from that battery to positive of the iPhone battery, same with the negative. Keep this connected for something like 15 minutes (not an exact science) after that try and see if it does charge. Or you could just spend the `$10USD for a new battery.
When a phone does not boot, it is usually not the battery, especially when mechanical damage is present. Also charging a completely flat (below charging threshold) battery is dangerous. The copper anode plate has dissolved and If you charge it, the dissolved copper may crystallize and form dendrites that will short the battery plates and iPhone will turn into a Note 7.
