I'm using the store bought 3.7v Li-Ion smart charger for all my sabers. When I plug in to a power socket the light shows solid green, when I connect to the recharge port the light turns solid red, when it's charged it turns solid green. I know this is correct and it charges all three sabers just as it should.
Right now, I have a 3.7v 3400mAh 18650 connected directly to a 2.1mm recharge port and when I connect the charger the light pulses between red and green.
What does this indicate? Has anyone experienced this? Any ideas would be greatly received. Thanks.

Greenie