So I'm very new to the RC Plane scene and I have done quite a bit of research, but for some reason while testing my electronics whenever i connected my brand new Wolfpack 3S 30C 1800 mAh 11.1V battery, the receiver(HKTR6A V2) for a fraction of a second lit up, but then went dark.
I removed all the servos and tried again a few times, and just once it lit up with a red light, so I guessed that it was working fine, and so was my Flycolor 20A Blue Multicopter ESC.
I then realised that I had completely forgotten to check my battery voltage, and so i hooked it up to my IMAX C403 charger. I couldn't find a lantern battery yet, so I improvised by using a 12V, 900mAh AC adapter. The charger powered up fine, detected my battery also, but it was showing that the battery was at 4.15 V. I tried charging it, and it went on fine, but after a few seconds, it gave beeps and said that it was full. What do i do? Thanks in advance!!
https://imgur.com/a/nG3ABp9