i got it direct from Brinkmann along with a replacement lamp for my maxfire lx. the rechargable version is identical to the maxfire lx except its about 1 3/4 of an inch long at a little over 7 inchs long. tail cap, bezel, lamp all the same. the battery pack is composed of 4 650 ma 2/3a cells. it looks like the pack in the surefire thread but yellow. qouted charing time is 8 hours (UGH!) its charging up now more info tomorrow evening.