How to completely discharge iPhone if it randomly turns off?
I have a problem with my battery - the phone randomly turns off. As far as I understand I can try to calibrate it - I have to charge it on 100% and leave on one-two more hours. And then to discharge it until it shuts down. But the problem is that it turns off randomly and doesn't discharge completely.
Is there a way I can do it? My only idea is to remove battery and connect it, for example, to a small bulb, so that the light will be on until the battery will discharge. Will it work or there will be the same problem because of bad calibration?
Can't buy a new battery right now.