Galaxy S4 drains battery while plugged in and charging

[AC Question]

I have a galaxy S4 with an abundance of problems overwhelming me such as not starting up, or dying on start up. About 6-7 problems all root down to the charging. whenever I have my phone lugged in, it does not charge all the way, ven htough it says it is charged all the way .I also have it sometimes when i plug it in, and do something like watch a video, it just loses power. I started at 40% today after I charged it a bit, grabbed it and started watching videos. It's currently at 1% battery power.I also had to have my phone repaired once because I could not charge it for anything, because the port was broken, got that fixed, and more problems sprouted out form it. can someone PLEASR HELP ME

 

[B. Diddy]

Welcome to Android Central! The first thing I'd try is a new battery.