As some of you may recall, I have been having this issue with my new Pila charger only charging my AW 18650 3100mAh batteries [all new from same trusted vendor] to 4.13-4.15v. There have been many answers and suggestions from everyone and I thank you all. A very informative bunch here with tons of knowledge that I respect.
Four AW's all charge the same, all new. I came to fault the Pila charger to the point that I contacted the seller. He agreed to exchange it. But during this exchange of e-mails, I received a Romisen which came with a Trustfire 18650. Well what do you know...it charged up to 4.19v. And it has done so twice already.
Yesterday I got my Klarus XT2C in the mail along with an Eagletac 3100mAh. I stuffed it into the Pila and ....well you know where I am going here....4.19v!!
So long story short [too late huh?]....was it the AW's all along that were not charging to 4.19v and there is nothing wrong with the Pila [as most of you were telling me all along] Two other brands of 18650 charge to 4.19v with no problem.
So please fill me in with what you all think may be the reason here. I would really like to know why this can happen.
Old batteries? High internal resistance? What are your thoughts?
Oh and the Trustfire...came with the light. It will be replaced by something good soon. :]