I have six cells of the LG (LGDAS31865) but the problem is that take a long time to charge. I'm charging with TP4056 module at 1 Amper and when it reaches 3.9v this stop of charge, I left about 4 hours charging and when I went to measure it was in 4.16v on board, but when I remove the cell it was in 3.99v, it's normal ? Because the others cells didn't take so long