Why isn't my iphone 5s charging?

I've had it for almost a year and before it worked fine. For some reason it has stopped responding to my lightning cable. So i borrowed my sister's cable (which works for her 5s) and plugged it in. The green charging symbol comes on and flickers a few times and then it stops charging. Currently, my phone is loosing power really quickly because of all the fast little millisecond charging sessions

Added (1). Note***** I also tried restarting it

Maybe it's the charger. Or maybe something is wrong with your phone

It might be your plug. Buy a new plug. That happened to me and I got a new plug it worked fine

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