18650 is the most popular battery type for flashlight. And Haikelite MT09R is the most up to date flashlight at this moment, it is going to ship end of this month. So far only BLF member Terry White has tested a sample with XHP70.2 LED. He will be testing another sample with XHP35 HI LED too. Below is the groupbuy link.
Haikelite MT09R GB