Thank you so much @DoomMeister! I had one bad lipo, but thanks to your guide I was able to fix it!
It had 0.55, 0.8 and 1.4v on the cells. I charged it with my galaxy s5 charger to around 3.4v, they only needed a small 5mn, 2mn for the last cell.
It's charging now in the Breeze charger :D
My...