Is it normal for the LED light to stay on while charging. When I purchased I was told I could use a eGo charger on this device. With previous eGo batteries I relied on the red / green light on the charger to tell me when charging was complete. I am a little concerned about the LED light staying on while charging. Is this normal? The eGo USB charger I own (Input: DC 5V 500 mA Output: DC 4.2V 420 mA). Also, the wall charger that connects to the usb charger I received has differant specs. (Input: AC100-240V 50/60Hz Output: 5V DC500mA. Am confused. Any feedback will be much appreciated.