This, further strengthen the need to include a workable 18650 cell together with M2T Warrior or Olight should really mention it in their manual or packaging that for 18650-size LiIon battery, they need a 67mm length cell to work properly

S1602 Fiberglass Touring Helmet - Solid Color Return to Touring Helmets FEATURES Made in USA Fiberglass outer shell Colors: Matte Black Gloss Black Metallic Silver Metallic Blue White Long oval design ABS inner shell Premium raw materials Leather strap is resistant to sweat, chemicals, cold cracking, UV resistant Automotive Urethane paint and high gloss clear coat 1/2 Air intake vents Molded air channels circulate air inside helmet Cushion Pad Interior Removable, washable pads Includes and 3/8 thick pads for custom fitting SoftTouch Fabric: Moisture wicking, anti-bacterial, anti-microbial Choice of Snap-on visor Double D Ring Fastener Sewn-in rear nape strap Compatible with SENA and CARDO Bluetooth communication systems (with Seer Ear Comm Muffs Sold separately) DOT Approved No mushroom head
This can help to reduce some of the natural aggressiveness as well
Additionally, these helmets help in quickly identifying personnel working between machines and production lines
Additionally, the top-loading hard shell flap area is JUST big enough for my D4
Closed face reels wear out faster since internal parts stay enclosed and often face more stress during regular use