The batteries ordered from Wallbuys were the protected versions. What turned up were non protected. Packaging from both companies was extremely poor. Each individual battery was in an antistatic bag, wrapped in a thin piece of bubble wrap and placed in the typical thinly padded envelope. I was surprised there was no damage to any of the batteries.
All tests were carried out on an i Charger 208B. Discharge was 3 amps.
This picture was just to show the 3 amp discharge rate.
Both batteries starting voltage was a rested 4.22 volts. Discharge was stopped at 2.7 volts. The Trustfire left had a capacity of 6525mAh. Resting voltage at the completion was 3.31 volts. KD battery right measured 6209mAh with a resting voltage of 3.34 volts.
Resistance. TF left KD right.
Current draw in my monster light with 9 amp driver on high with 3 batteries in series. TF left. KD right. On the light meter there was no real difference in light output with the different currents. Is the difference here from the higher resistance in the KD battery causing the driver to draw more current?
And finally the measurements. TF 65.5mm (flat top) long, 32.5mm diameter. KD 69.9mm long, 32.76mm in diameter.
Update 1.6.14.
I have worked out how to hook the iCharger 208B up to the PC to get these graphs.
It was disappointing to see the capacity loss on the two sets of older batteries. Whether this was due to the temperature as the original tests were completed in the summer and these tests were completed in the winter or they are just losing capacity due to poor manufacturing. The original tests were carried out to 2.7 volts while these were at 2.8 volts not that I believe would make any difference.
I have a pair of the much older unprotected KD 32600s. Must bung them on the charger and see what they can do. But your iCharger is probably more accurate than my HobbyKing B6 clone. The original protected KD 32600s infamously couldn't power an ROP high bulb (About 4.2A-4.5A on a good day.) Mine are about 4-5 years old so it'll be interesting to see what they can do.
Chase me on this if I've not got round to it in a few days.
Current draw in my monster light with 9 amp driver on high with 3 batteries in series. TF left. KD right. On the light meter there was no real difference in light output with the different currents. Is the difference here from the higher resistance in the KD battery causing the driver to draw more current?
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To me it seems so. The Trustfire battery probably have less voltage sag so it does not need to deliver as many amps in order to deliver the same amount of energy as the KD battery.
I’m going away for a couple of days so bear with me. I ran the test at 3 amps as that is what they will be run at in my lights. I would not be surprised if they were not the same cell being FeiLong. Only a guess though.
The only device that can instrument a discharge that I own has a max discharge of 500mA. Which given that these cells have spent the last 4-5 years being discharged at 4-5A is a pity.
Thanks for the test. Once again, a Trustfire flame looks like a decent cell. I'm still waiting to make the jump to 32650's. I have a Feilong 32650, but nothing to put it in yet, and probably won't until I find a triple MT-G2 build I'd like to replicate.
Same goes for 26650's. The capacity would be insane if it was built to the same standards at the NCR18650B, and might even have higher since the electrode would be relatively smaller...I think. I don't know who'd push for it though. Electric vehicle manufacturers? It might allow them to use simpler and less expensive charging/balancing hardware. I don't know, but I'll keep dreaming.
Thanks MRsDNF! This makes the second review showing this cell to be one of the great ones from China. I just received 3 x Trustfire Flame unprotected 32650’s from wallbuys. I put all 3 of them in my Fenix TK70 and get roughly 1/3rd more lumens. I think the added voltage throws the driver into direct drive. All I get is turbo mode and sos/strobe with 3 cells. Going back to 2 cells gives me back all the stock modes. If she blows, it gets a different driver. I have 2 discharge cycles so far and all cells ending voltage is within .01V of each other. Nice!
Im still enjoying the heck out of my Trashfire 32650’s. These just might be the only decent Chinese cells ever made. Mine run hard in my Fenix TK70 and work well in my Trustfire TR-J20
