I have been using the AG-126 Lithium Ion Battery Charger to charge 2 18650's at a time. This charger seems to be pretty popular so I am hoping that someone may be able to help me understand the functions of the charger. If I charge two 18650's it takes about six to eight hours and then the red light starts to blink. If I leave it on the charger for another hour or two, the light will start to blink from red to green. The blinking seems to last for a long time. Do I need to leave them on until it turns a solid green? One time I left them on for over 10 hours and still no solid green. I usually stop them during the blinking stage and they rate 4.2 of my multimeter so I assume they are fully charged. Am I correct, or should I leave them on longer?