My iphone 4s is blinking, how do i fix it?

My iphone 4s is blinking and i've never dropped it or anything, it died this morning and i charged it, when i tried to get on it it was at 5% battery and is blinking at the lock screen. It will not charge more than 5% and it will not turn off, how do i fix this?

Sound like you need a new battery

Restore you iphone:
Hold the power button and home button at the same time, when it restarts repeat and when the apple logo disappears imediately let the buttons go(this should make the iphone force shutdown)
- plugin the USB CABLE into pc
-try to plugin the usb(in iphone) and at the same time hold the buttons previously used until the itunes logo shows up in your device the let go the buttons and follow the steps on the pc. If it didn't do anything consider buying a new battery

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