Efest, MNKE, or Panasonic for 18650's. Aw imr 18490, Trustfire 18500, and also the blue MV 18350. I like the most vapor though and all the 18650's I listed do really well. Flat or button top.
throk" data-source="post: 7622411" class="bbCodeBlock bbCodeBlock--expandable bbCodeBlock--quote js-expandWatch">That's odd. I got my telescope from Liberty Flights. The vent holes didn't need sanding, and were smooth without any sign they'd been sanded by the vendor. Also it's a solid as a rock with any battery in it...no wiggle at all. Whether 18650 or 18350 (those are the only two I have atm). Once the battery is in there and the tube screwed together...it's like it was all one piece except for the ridge between top and bottom.
Build quality on both my telescopes is fantastic, the finish is good, threads are smooth, fires every time I want it too. It's a shame there appears to be inconsistencies in the quality of the telescope, because I can't recommend mine highly enough.