Today I received 4pcs from Manafont.
Resting voltages at arrival were: 3,83V, 3,84V, 3,85V and 3,86Volts.
Charged up to 4,17V with Xtar, now discharging to 2,7V with Imax B6 @ 1Amp.
Will give some capacities for comparison later in the evening.
I just received 2x 2-packs of these Trustfire 3000mAH 18650 cells from Manafont. They seem like legitimate cells and not fakes, if anyone is concerned. All cells appear to be very well built. The have very good quality, well-printed wrappers on gold-hologram foil, and have the Trustfire hologram sticker on the outside of the overwrap. Unfortunately, I don't have a way to test cell capacity, but they look like the legitimate product.
Have you or anyone else tested the protection circuit? I already had an issue with one of those and most of my other "thunderflames" are in multi-cell flashlights, so I am a bit worried...
Wow 2 weeks and still not finished discharging... sure you set them at 1A? maybe accidentally set 1mA? JK
Anyhow since some others are expecting result, I also got a couple of TF3000 Flame from Manafont recently and Imax B6 gave reading of 2400++ mAh (don't remember exact) at 1A, discharge to 3V.
After discharge to 3V, I let them rest a while, pop the discharged cell into the 3-mode Ultrafire Manafont drop-in and whoa... still lots of light. Tail cap read at 1.4A. Quite amazing. The battery still have some good juice left after discharging to 3V. The current seem to be stable too, dropping only a bit at slow rate.
I didn't quite test the discharge down to 2.7V BUT from the feel of it, even at 3v and the way it supplies current, it should still have 100-200 mAh left. I believe you could get 2500+ mAh from these cells. Well, at least from this batch.
I shorted mine on the 10A setting of my DMM, 5.6A for a sec, after that 0.0. Shut down in UF980L on High (Direct Drive) after about 30min of a buttload of light, 20min usable light and 15min of firefly.
Just to mention that I got some of these cells from DX and they are now selling the same old fake 2400 (not the good 2400 flame) wrapped in this new shell. All of the 4 I've tested are actually 2000mah at 1A discharge. Still decent quality for the price, but definitely not as good as the ones tested at the beginning of this thread.
That's what I got. Sorry I think I was not very clear: the 3000mah trustfire on DX now are actually 2000mah, exactly like the new 2400mah trustfire on DX, which too are 2000mah. In fact I suspect that they are the same cell, as they perform exactly the same in the tests I've done.
Oh sorry. I thought you were talking about the 2400 flames. The 3000mah ones actually costs a good couple of bucks extra. So that kinda sucks harder. Better to get the 2400 flames and save some I guess. I heard DX acquired a battery tester to ensure quality of these cells from next batch. Hope that would stop selling of these fake batteries.
Some guys on DX forums have said that DX has tested some cells that's why they area saying 4000mAh and not 5000mAh for Trustfire the 26650 cells. Which apparently is some client lure text as the same 4000mAh "real capacity" text can be seen on Taobao.
Regrading fake cells, it's not like they buy from vendors that knock on their door and receive what they have in their bags at the moment, they know very well who sells which and what. DX to be able to have such low prices has to deal only with major distributors for longer periods, they cannot buy from here and there.
That's too bad. It looks like only the first batch was good and then their quality took a nosedive. I don't know what they can gain by deceiving customers. Sooner or later the truth will be out as always.
Thanks for doing the tests. I ordered the TF 2400 flames instead and saved a couple of bucks.