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Hey, so I have an iPhone 6 that I have replaced the battery in twice. It charges fine and everything, but when it dies, it dies. It won’t turn back on and I figured out I need to revive the battery with a battery tester. I have a friend who solders motherboards, so I might give it to him if its a Power IC issue. But I’m not sure if that would work or if it would be a waste of time or not. Thoughts?

If it drains the battery quickly get your friend to replace tristar.