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I’ve had my iphone 6 for about two years and recently it has been losing its battery quicker. This morning, it was at one percent and then it died. Then I plugged it in and it has not turned on since. When I try to to do the hard reset by holding the home and power buttons, the battery symbol pops up. At the moment it is plugged in to the computer and shows that it is charging but it still isn’t turning on I would appreciate any advice, thanks

It sounds like you have a dead battery. You can replace it yourself by following this guide.