Sorry, didn't get a fake but there's a few other 4000 mAh 21700's I tested and they do pretty good but not as good as the 40T or 30T. Hard to compare the E07 and ROT66 because the carrier on the ROT66 probably adds resistance, though I haven't tested it, then you have to compare apples to apples with the LED's and optics of course.
Dale - I agree the EFEST are good cells, you do pay a premium for them usually, but can't complain bout the quality whether they are a rewrap or not. Sometimes wonder if they mod or change the batt+ end with a better conductive material, or mounted better. The discharge curves act as a signature of the cell, and the EFEST discharge curves, I thought, did match or come close to branded cells, or close enough. Maybe there are grades or binning involved with cells and the EFEST are from the higher grade binning - think someone mentioned this binning here on BLF.
I seemed to totally miss the gold Golisi 26650 4300 mAh. Compared to the Shockli 5500, it certainly beats the Shockli at high amps thru the entire discharge, but at lower amps, it only beats it in the beginning, which is fine too. Seems expensive -- I'm trying to find the best price, hoping without it being a fake
Thanks Tom. My E07 is bright enough with the cell that Fireflies sent me that I'm not motivated enough yet to get a real 40T unless I see some substantial difference in user tests.
It's the old debate of initial bling brightness vs. slightly less, longer runtime because of less draw, cooler running. The other questions on the fake though is:
safety - how safe is a no name fake?
capacity - is it really 4000 mAh or close?
reliability/quality - yea it's bright now, but how does it do in 2 years, after 10 or 100 cycles, if they faked the name, then we really don't know much about the integrity of this cell
Hopefully they simply wanted to save a couple bucks and used a decent, though less performing cell, but we really don't know.
It's the one thing that has been bugging me since the beginning. I was the first to say the cells don't look like real 40T's and then more posts came from everyone confirming they aren't real. I know it's Chinese New Year but Jack at Fireflies has been completely mute on the fakes he sold us. I agree that he was probably not aware of it himself until I emailed him the first time, but that was way before their new year. All I asked was if they are safe and no response, which means he probably doesn't even know himself. I'd feel a little better if at least the cells could identified to be from a reputable manufacturer. Jack is around as he responds instantly to praise but that's about it.
Anyway, made a decision today to drop both fake 40T's off at the recycle bin and call it a day. Just ordered some real 40T's at the 18650batterystore for peace of mind.
Ok, whew. I did the first swap of the XPL HI 5000k into my grey E07 for my work light. Discovered super fine layer of thermal past on both lights. Be ware of smoothing back flatter with a file. You can remove a lot of copper doing this. I will just use sanding paper on a flat surface on the nichia light. My solder gun tip bumped a aux light wire and melted a hole through the liner, so I had to patch with heat shrink. Omg this was some tedious microscopic work! I ended up breaking out a headlamp and magnifying glass to complete. It all seems well and working The nichia back before beveling edges. I’ll do this later. I stressed out enough for one day, but the work light is ready for duty tomorrow:)
So I got a refund from BG. I am thinking of buying another E07 but want to be sure that the teething problems in the manufacturing process have been resolved and that the remaining old stock has gone. What is the consensus on whether this has happened, and what was the most problem free version? I suspect I should wait at least three more months but wanted to see if anyone with more knowledge than me knows if a better E07 is out there. I know that the bare aluminium version has manufacturing improvements but have also seen problems still being reported.
Hello everyone I know this is not the right place to ask for mods or whatever… im kind of in the new side of buying the E07 and I want to know if i can mod the light just a little… gonna buy a titanium cap that is slightly bigger than the battery cap on the E07 and a flat coin type magnet to have magnet on the tailcap… do ya’ll think it’s a good idea or heck nope
I think you should test your idea first with the magnet you intend to buy and some tape. The E07 is pretty top heavy so you will want a pretty strong magnet.
You could just JB Weld a rare earth magnet to the end of the stock tail cap. I’ve seen it a few times in a Zebralight mod thread. Didn’t look too bad IMO.
Another option is to buy an Emisar D4s for when you want a magnetic tail cap. Great light that’s right up there with my E07.
Ok, whew. I did the first swap of the XPL HI 5000k into my grey E07 for my work light. Discovered super fine layer of thermal past on both lights. Be ware of smoothing back flatter with a file. You can remove a lot of copper doing this. I will just use sanding paper on a flat surface on the nichia light. My solder gun tip bumped a aux light wire and melted a hole through the liner, so I had to patch with heat shrink. Omg this was some tedious microscopic work! I ended up breaking out a headlamp and magnifying glass to complete. It all seems well and working 
The nichia back before beveling edges. I’ll do this later. I stressed out enough for one day, but the work light is ready for duty tomorrow:)
so its abandoned or what?