Rechargeable Dive Light 
 
Brinyte DIV15S dive light with aluminum goodman handle  
Four LEDs, 3800 lumens
8 degree beam
Waterproof side magnetic switch
IPX-8 Rating, waterproof to 200m
Premium military type III hard-oxidation treatment for abrasion and corrosion resistance
SCHOTT toughened glass can stand higher water pressure resistance and scratch.
Duration: 1.5 - 3.5h (high to low power)
Recharge time: not specified
 
Includes:
Aluminum Goodman Handle
Two 26650 5000mah batteries. 
Single battery charger
One year warranty (customer responsible for shipping)
 
Double battery charger can be added on for additional JPY 1,500 (Pictured)
(Light takes two batteries at once, so double charger seems like a wise upgrade)
 
With LED light technology on the rise all the time, we have been on the search for an economical alternative. Dive lights increase enjoyment and safety as a signalling device in poor viz, and for primary lighting at night. This one seems to be of good design and durability. Time will tell how they last. One of our dive leaders has one from this year (2018).
 
YouTube video of DIV15 in use (Same light as DIV 15s, though 15s includes Goodman)
DIV15 Info Page
Brinyte Website