Thats great info, thank you again, I know I’m a noob but its weird that the cut off spec isnt listed…
Those keepower are BO on illumn, and illumn charges like 40$ shipping to canada 
The non usb fenix 18650 3500mah will work fine as well though its not cheap in canuckistan
Or just use unprotected and dont screw up 
I’ve bought a couple of battery orders from illumn in the past year, the last one a few months ago. Shipping was always around $15 or $16 to Canada. Have they recently jacked up the price that much? If so, it’s probably not worth buying there again. That $2 surplus per cell (I usually order 8 cells), suddenly jumps to $5 per cell!
One last thing and plz correct me if I’m wrong. Both button and flat top can be used in s2+ but a button top would have more tightest fit. Any other difference?
I’m going to use that flashlight in my bike. Especially for bike use, wouldn’t be better to have that tightest fit (so less movement of battery inside the flashlight)?
If you don’t fully trust the store you can buy from Nkon instead, prices are a bit cheaper but shipping from Netherlands may be a bit higher.
It’s possible that the button top might have a tighter fit, but I’ve never noticed a difference on my road bike between button and flat top 18650s in the S2. Convoy uses what appear to be high quality and stiff springs. I’ve had them knocked off my bike at 20 mph (using the wrong mount in a pinch) and hit concrete, and still not even change modes. I don’t remember if that particular incident was a flat or button top.
If u want the tightest fit get a protected button top