[AC Question]

I have a android phone (wiko pulp fab 4g) and i love it, it always worked amazing, since 3 days ago. it started by not charging to 100%. 3 days ago it only charged to 97%. It charged the whole night.
Then 2 days ago, i put it to charge at night, turned of. in the morning there was 0%. apparently, the phone didn t charge, even tho i saw the red light telling it was indeed charging. I put it to charge, it reached 97% at some point, a hour later i came back and it was only at 96% (lost 1% still connected).
Yesterday it charged to 98% while on. I rebooted and it went up to 100%.
Today i charged it in the morning, it lasted just a couple of hours, and now i went to charge it again, and it didn t shoed any sign of charging. i tried several times, and i rebooted, took of the battery, and it worked. Any suggestion on how to fix it, and what is going on?
Thank you guys.