I have tested it once before with a severe case of discharged battery.
It worked but battery was beyond repair.
Now, I have one TF 3000 discharged down to 2,84V by my newly acquired Marsfire flashlight.
It did not work, stupid me left battery in there, afterwards noticed, that light was on and bad circuitry took a small drain...
It has now been charging for some hours, Voltage is already well over 3V.
Worked for me . Revived two 17670's that I thought were goners
Weird.
Just paid attention, the other battery in Marsfire is at 3,90V... and poor me did not even check out the voltages before loading.
I trusted they were at proper voltages, since I checked them about 2-3 weeks ago, since then have been on the shelf.
So, it seems like one of the Trustfire "Flame" 3000's failed after just after 5 cycles, amazing...
Fortunately I haven't discharged unprotected batteries that low. A few occasions when my protected batteries tripped the xtar wp2 II revived it no problem. However I noticed the TF 14500 I just revived yesterday is at 4.15V instead of the consistent 4.17/4.18V termination. I wonder if that means anything. I assume it will bounce back to 4.17 on the next charge cycle. Will see.
Did not work, battery is dead.
I have had really bad luck with these 3000´s :(
Idiot me: burned my finger while opening the wrapping... Tossed it out. It really takes like 0.1 second to get that - to + foil redhot!
Please: be more careful than me
It worked fine here w/ a Solarforce 2400mAh cell overdischarged to 2.7V.
Did you manage to make out what base cell was used in the Trustfire 3000 you threw out?
Can´t really say but will post pics later.
There were only a couple of printed marking letters and they looked a bit blurry.
Pictures from gutted Trustfire Flame 3000mAh
Text is very faint, I would guess it says "BCF" and "C" below them.
The positive end.
Negative end.
Circuit board looks new (says 2011 even) and definitely not messy at all.
Hmm.. Not clearly from a well-known manufacturer then. That's disappointing as I had thought they were assembled by keeppower (only use good base cells) due to the outside appearance/ quality.
Were these from manafont or some other dealer?
These are from Manafont, as my previous 3000´s also.
Just noticed, this gutted one probably had only a tripped circuit.
Is it possible a protections circuit does trip off but it still reads ~2V when measured?
How to un-trip it? Got only that WP2 which does not do that and ImaxB6, which seems to abort, over voltage ?
So far I only managed to trip the protection on a Trustfire flame 14500. I also have a WP2 so I used another charged 14500 to reset it by paralleling the charged 14500 with the tripped 14500 for 1-2 seconds.
How did you work out it had a tripped circuit? Did the bare cell read a much higher voltage?
First, it had a OK-Voltage of 3.84Volts.
After set to charger, it started to "revive", I was a bit confused and measured it again = 1.94Volts.
Scratched my head for a while, then tried again, remembered Xtar has no reset function. Tossed it into ImaxB6 to give it a Jolt with "wrong" settings.
After this, I got it to read again 3.83Volts.
Loaded it into flashlight, test and only a short flash.
Then again 1.9x Volts.... Got a bit frustrated so threw that one also to dumpster.
I cannot say, what happened, circuit failure?
It could have been used as a bare cell allright, but I got sort of frustrated and pissed with these already then, when I measured lesser capacities from my second set than good 2400's...
I have had really, really bad luck with these 3000's. None of my Flame 2400 from DX, DD etc have not had this kind of problems. :(
I'm confused. The xtar wp2 II (not the first model) is able to revive tripped circuits.
Tripped circuit should read 0 volts, at least afaik. If it reads 2 volts I think it's not a simple case of a tripped circuit.
Also, before throwing them did you try just removing the circuit and see if the battery is still usable?
What kind of "wrong" setting did you use when trying with imax B6?
I revived a few batteries before with the B6. I used NiMH setting, set charge to 0.1A and monitor the voltage. This method should be ALWAYS ATTENDED if you please :) . B6 is smart enough to shut off if battery short or too high resistance encountered, but you never know.
In a minute or so, the voltage will be above threshold and then I set back to LiPo, charge normally. This works all the time.
Oh, and I thought both models were unable to do this!
I have absolutely no idea, why I cannot un-trip the circuit with Xtar or Imax.
Good thing I forgot to take those batteries to recycling 2 times today, bag is still here.
I took the tossed battery out, stripped the skin and the Bare Cell still measures 3.83V.
Took the circuit out, battery is now charging as normal. I re-wrapped it naturally.
I used basically the same, only with a bit higher amps.
Set the charger up, charge, instantly pulled it off.
It kinda worked, got the reading 3.8V from protected battery but circuit tripped instantly again when inserted to a flashlight.
After trip, Xtar was again unable to un-trip it.
Bad circuits?
Some PRO willing to take a look at PCB? (Will send anywhere free).
Sounds like you have a delinquent circuit, always trippin' and stuff :) Was it on mary or shroom?
I've got some TF3000 and 2400s too and if their protection kicks in, I just have to wait a few seconds and it'll work again. Smart PCB?