Little background...I have video lights that use 5000mah batteries and have several sets of these already. I am looking for a new dive light that uses the same batteries to lighten the load when traveling. I don't do cave diving and the light would primarily be used for night dives. The batteries that I have now are XTAR model 21700. I checked the XTAR site and they have one light that might work but am seeking other candidates that you would recommend.