I have build a batterypack (4x 18650 in series) with the bflex driver and 3 Cree's in series. Every time after the cutt-off voltage were reached there are only one cell that reached its 2.75v protection cutt-off while the other 3 still have a good charge in them, but because of the one dead cell the light is not working anymore. Its not a faulty cell because i tried others.I tried the bflex with protection cutt-off and without, the same result.
Thanks
Thanks
