Fellow vapers - my XTAR WP2 II is playing games with me. I've had it for a few years, and it worked perfectly with all the AW, Efest, and Panasonic batteries I used to have. But when I put my new Samsung 2600mah batteries (the pink ones) in it, the lights NEVER turn green. I've left them in there for hours and hours (while I was awake in the same room, of course) and the light stays red the entire time. However - when I pop them out and put them in a mod to check their voltage, lo and behold, it's fully charged and back up to 4.1. Is this some sort of common problem I just didn't know about? Is the charger just "confused" because the batteries are a higher capacity? Thank you...