Pretty sure I know you. Im also pretty sure this board came from the first bunch. Even though its new. Im starting to wonder if it was an issue with a batch of the older boards.
I swapped the 510 (both source 510's). Ive tried numerous RTA's and RDA's with different coils. Guess I will bite the bullet and replace the board and just keep this one for wattage mode
This is my favorite build so far with a 250C as far as the bigger boxes go. It is from stealthvape and it fits the hand way better than the N1. 30mm 510 and you will need there board holder and buttons but its pretty straight forward and great quality box.
I really dont want to take this battery out but if I have to so be it. I left it on charge to see if it would balance itself. Its a brand new battery so it was shipped a little off. Batt 2-3 will get to 4.2 and keep backing to 4.198-4.199 and battery 1 is at 3.946. It did go up to 71% from 70