Chosen Solution

Hello. I replaced the battery of the phone today following the tutorial. But when I finished and plugged it… it said that battery was on the 36% and Fast Charging…. but a couple oh hours later it says (while still connected and Fast Charging) that its on the 16%!!! I turned it off and I will leave it the whole night charging. But do you know what could have been wrong? after writing this message (couple of minutes), it is still on 16%. I strongly believe its not charging at all… Thank you!

@guillermoto try to measure the voltage on the battery contacts with the phone plugged in to charge or use an USB ammeter to see how many (milli)amps it pulls when charging. Since you just replaced the battery itis possible that this is a bad battery.

Unfortunately I don have a usb anmeter…. I think i will put the old one again… that way I will know if I broke anything else in the disassembly