Battery acting weird since installing kit kat roms topic

For some reason my battery is acting like it barely wants to charge. It'll take hours just to go up by 4% and once it reaches a certain point, it no longer moves up in percentage. Sometimes it stops at 14%, sometimes it stops at 32% and sometimes it stops at 8, it's completely random. Also when I restart it, the battery percentage is completely different than what it was before. The weirdest thing is that the battery percentage actually decreases sometimes while it's on the charger. Even when I cut the phone completely off and it's showing the battery charge icon, the phone drains in percentage. This just started a couple of days ago, maybe a week after I flashed a kit kat rom.