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My battery started loosing is power really fast for about 3 days, then after i couldn’t open it at all i would only see a red battery on the screen once plug in and never charge up. So i change my battery got it full charge and just a few minutes after unplunging it, it started loosing charge again 2-3 hours later my phone is dead again. Is it another problem then my battery or there are setting i need to do to conserve my battery longer? Thanks

It could very well be something with the phone’s charging system. It would be worth taking to a professional repair shop to have them look at it.