iPhone 6s dead and won't charge
I've had my iPhone 6s for a while, and has always charged fine until tonight when I have plugged it in to charge, it was dead but only for an hour or so, and now has been on charge for over an hour and is still coming up with the battery charging icon when the phone is dead. Occasionally, the phone goes completely unresponsive, and then tells me that the phone is dead and charging again.
Anything I can try to fix it?
iPhone 6s, iOS 10.3.3