Fireflies ROT66 Flashlight

I borrow the light from skylumen. Ask him.

With a screwdriver.

There are Phillips-head potentiometers on the aux LED board.

Someone had it drain three full cells in a few hours. Whatever was wrong, it wasn’t any regular sort of standby drain. It’s probably a short of some sort.

after further testing, the batteries are fine after 7 days in the light. after the voltage dipped below 4.0v it dropped like a rock and red leds came on. the batteries were at 3.16v

I have my three rot66 stand by for 9 days after fully charged…

Rot66 aux mode ( med ). 4.16 v

Rot66 aux mode ( med ). 4.13v

Rot66 aux mode ( high). 4.15v

The ROT66 standby drain should be between ~0.03 mA and ~0.70 mA, depending on the exact model and configuration of the light. At worst, it should take at least a year and a half to drain three 3000 mAh cells.

So… if something drained them in under a week, there’s something else wrong.

Out of the box, are the aux led’s bright enough to walk around a dark room with? What if the potentiometer is cranked up?

No, but they are on the D4S

I will get FF to look into it.

My ROT66 didn’t have Aux-LEDs, but my D4S has. When the D4S aux-LEDs are configured to “High” mode, they’re nearly as bright as the main light on the lowest “Moon” mode (maybe 1 lumen or a bit less)? Certainly enough to walk around a dark room with.

I wonder how the ROT66’s Aux-LEDs look like (does it also have a Low and a High mode?)

The D4S aux LEDs go from about 30 uA to 1000 uA, on low and high. This is controlled by the firmware.

The ROT66 aux LEDs go from about 200 uA to 600 uA, ish. This is controlled by a screwdriver.

Ordered one “glued”, as it was going to be a gift.

SST20 4000K

All emitters come on when the light is cold. as soon as it heats up one emitter shuts off. And then another one starts giving up. So after a few seconds on turbo, two emitters are off.

FF definitely need to step up their QC game :weary:

So this has turned into a test of the FF 3-year-warranty/customer support.
Sent them a mail three days ago, no response yet.

PM him on here. I had a cosmetic issue with one of mine and Jack went out of his way to do anything he could and there was nothing he wasn’t willing to do. This was just recently.
I’m sure he just overlooked your email with all that’s going on.

does that only happen on turbo? Like normal ramping it’s fine? Always the same two?

He’s sending me a battery carrier to see if it fixes my battery drain problem. No charge. No hesitation.

Always the same two.

Happens with regular ramping at lower levels also. As soon as the MCPCB heats up, they start failing

FWIW I just got a PM regarding my post :+1:

I just got my rot66 xpl hi 5000k… i bought the one with the scratch to save some money… the scratch is just on the bezel. i cant believe sony vtc5a give 1000 more lumen than samsung 30q.

Sony vtc5a 7300 lumen
Samsung 30q 6000 lumen

The 30Q is a nice mix of high capacity and still high current. Capacity and current is always a trade-off. If you don’t mind less capacity, you can get higher currents. For example, the Sony VTC4 2100mah can deliver even higher currents than the VTC5A at around 30A continous. So you just choose what’s best for you.

Hey guys,

Can the aux LED potentiometer be accessed on a glued ROT66? Or do you need the unglued version for access? Thanks.

You would need the unglued version for access.