My mother's phone didn't want to charge and there were some important stuff that she wanted in it. I cut the charger pin, then I took the wires and connected them to the battery terminals on my phone. Then I put the battery in. I left the phone on my bed for about 10 minutes. when i returned it didn't want to switch on at all. Have i killed it? Is there anything i can do to repair it? Please help
Yes, it's still repairable. I honestly don't know how to so I suggest taking it to a cellphone repair shop. Or can you at least undo what you did?