My iPhone 5s won't turn on. Its battery was drained for more than a month. I tried charging it for more than an hour then pressed reset but it still won't turn on. What could be the problem?, My iPhone 5s won't turn on. Its battery was drained for mo

Leaving a lithium ion battery in a drained state fro an extended period of time may kill it. I would try leaving it on charge for several hours then trying to reset it again. If it still won't turn on, you may need a new battery.

You said "reset," so Meg assumed that's what you did. But "reset" is not a button; to reset the phone you must hold the HOME and SLEEP buttons at the same time until an Apple logo appears. You may have to hold for up to 30 seconds, and if the battery was completely drained, you will have to restore iOS using iTunes on your computer.

Good catch, Lawrence. Thanks!