I have two batteries for my L30 but need a couple more. Other than paying 20 dollars a piece for the Acebeam ones is there any others that anyone can recommend? This is my only 20700 cell flashlight so I have no clue who makes good 20700 cells with a higher capacity for longer run times. I think the Acebeam cell is protected but not sure, there was no information in the owners manual. Thanks everyone 
Panasonic/Sanyo NCR20700B 4250mAh 15A Battery
Perfect, thank you Texas Shooter 