I had a Empire Mod in Black Diamond Cut and some Bobas Bounty waiting on me when I got home today. On the left is the Empire in 18350 mode and on the right it’s in 18650 mode. It supposed to take any battery from 14500 thru 18650. I’ve tested 3 so far. They all work good. The bridgeless atty that came with it is working quite well. I love the 901 with the dripshield.