Bogus Dive Light Claims?

[fmerkel]

Ty, appreciate it!


Four batteries...
"Protected Panasonic/Sanyo NCR18650GA 3500mAh 10A 18650 Button Top Battery"
A cheaper charger (hope it works well, I don't need all the bells and whistles)...
"Nitecore New I2 2 Bay Li-ion Battery Charger"

Good batteries.
You don't 'need' the bells and whistles, but you REALLY DO want an analyzing charger. They are not a big complicated deal. IMO the money is well worth it for the information you get. Without one you don't KNOW if you have real cells with claimed capacity.

 

[tbone1004]

@fmerkel had a pair I tested yesterday actually. Claimed at 2400 in a camping light, tested out at 1600mah. Not a huge deal for that application, but a REALLY big deal if it's in the backup lights that I'm using in a cave where I NEED the burn time to last long enough to get out. Obviously that's not a normal use case for these, but even on a night dive, if you are planning to be down for 90 minutes, the light manufacturer says it's good for 120 mins based on that 2400mah battery, but it tests at 1600mah, whoops....

 

[fmerkel]

Typical.
Knew an instructor that was getting the same light as the DGX 600 from China and having them engraved with his logo to sell to students. To sweeten the deal he got "IMPROVED" 5400mAh cells to go with the stock cell. I knew those were fake. Tested it for him > 900mAh . He wondered why they had such a short run time.

Note - stock cell tested out within spec, at least those did. Not great, but decent and at least honest.

 

[Rick_C]

I would like to add that I emailed both Ocean Quest and Scuba.com with a link to my Ocean Quest 3600 review video and asked for their feedback. Neither company has responded.

 

[fmerkel]

Of course not. They they would have to acknowledge they know. Ignorance is the best defense....

 

[Rick_C]

New update. Today I received a response from SCUBA.com. They watched my video review and talked to Ocean Quest. As suspected, the light is designed for the larger 26650 batteries and they will be updating the package to include two 26550 batteries. This should be available around December and when available they will provide me a new light package so I can do an updated video review.

 

[runsongas]

even with 26650s, it will not reach 3600 lumen at stock without a resistor mod. these are basically the same light as the solarstorm dx4s.

Solarstorm DX4 dive light - anyone used it? | BudgetLightForum.com

Buy Solarstorm DX4S XM-L U2 3000-Lumen LED Diving Flashlight Torch , from for $49.99 only in Website. Worldwide Fast Free Shipping!

i use soshine 26650s in mine, but the keeppower 5200mah are actually slightly better.

 

[Schwob]

Some folks don't like the little fan on the Opus. It can be noisy and being tiny (and cheap) can fail. But, the fan does cool which allows the Opus to have extra power. Discharging and fast charging can produce a lot of heat. Heat is the enemy of li-on. Fan is pretty easy to replace and/or lube. I've replaced mine with a superior unit but kept the old one going by lubing it for years.

What are the ins and outs with lubing tiny fans? (How to / what lube)

 

[Rick_C]

even with 26650s, it will not reach 3600 lumen at stock without a resistor mod. these are basically the same light as the solarstorm dx4s.

Solarstorm DX4 dive light - anyone used it? | BudgetLightForum.com

Buy Solarstorm DX4S XM-L U2 3000-Lumen LED Diving Flashlight Torch , from for $49.99 only in Website. Worldwide Fast Free Shipping!

i use soshine 26650s in mine, but the keeppower 5200mah are actually slightly better.

That's some good info - I knew that light had to exist under a different brand, but I couldn't find it! I think the benefit of the 26650 is runtime, when I tried both batteries I didn't notice any boost in brightness, but much longer runtimes with the 26650

 

[eelnoraa]

That's some good info - I knew that light had to exist under a different brand, but I couldn't find it! I think the benefit of the 26650 is runtime, when I tried both batteries I didn't notice any boost in brightness, but much longer runtimes with the 26650

And 26650 can sustainably put out 2+AMP, which 18650 can't. Lower internal impedence across charge level