Hi, I bought an iPhone about 2 months back and I’ve been having some problems with the battery it seems. When I first bought it from the guy it was having serious issues with the battery, it could barely hold a charge so I took it and got the battery replaced and it’s been fine since then but recently it’s started getting kind of.. odd? Lol. Earlier I was charging it and it was at about 73% when it suddenly said my battery was at 10% and I need to charge it (it was still connected to the charger cord at this point) so I unplugged it and it stayed at 73 but then i watched a few short videos on YouTube and then the battery was at 50 percent. I’m wondering wtf is up with this