C8 Q5 CREE five LED surefire flashlight light going on
There is a general light LED flashlight, battery drive circuit board and LED lamp is composed of three parts, of course, shell. Q5 lamp maximum drive current to the 1A, the 1A current is about 250 lumens brightness. LED drives best with constant current.
1. Maybe the battery is not charged. Use the meter to measure it.2, the battery positive and negative anti loaded, the positive electrode of the lithium battery is not particularly obvious, to see the side of the + sign.3, sufficient electricity is not bright, that is the problem of flashlight.
Some inexpensive flashlights may use a very common drive circuit board, and I estimate that the drive current is not enough. There is a low level light fake Q5.
