In this set-up you need button top cells both for driver contact and for battery-battery contact in the middle.
I asked TA if he worked on this light or if Haikelite is just adapting his older MT09R driver without his knowledge. If he worked on it he might have some insight into it’s performance.
Update, he didn’t work on it. Haikelite must have adapted the driver themselves.
That one is like Supwildfire(Mitko super thrower) on steroids and neck switch 
Xanes zoomable flashlight with 80mm lens: 
There is some discussion as well as links to cheaper (but potentially lacking powerbank) variants here
Thank you! It is really cheaper on Aliexpress.
I have a feeling it’s plastic junk but I like the use of 2*18650 and overall format.
http://www.aliexpress.com/item/32733422105.html
One can assume light has unbranded emitter installed when you see "CREE T6" for specs.
This could be the weirdest flashlight for 2019 
That switch looks like convoy BD series with recharge contact points. Weird looking light
As do I, but would love a 21700 type, slap on an L2 Head… hmmmm
Definitely not liking the Plastic Fantastic. Looks REALLY cheap.
Tool battery pack powered flashlights are very common.
I can see a train hopper using this 
How did the BriteBucket avoid this list? It’s not a host, heck, it might not even be a flashlight! But it has it’s own song.
Brought to you by Nebo, “We’ll Put a Light in ”Anything”:https://www.nebotools.com/p/GLOW/524!”