Testing the over discharge protection and it works.
4.15 volt to 2.75 at 7 amp discharge
(charger maxed out at 6.43 amps, battery 3.091 volt)
Data table
Volts vs mAh
Volts vs Wh
Photo's showing that the protection pcb on the battery kicked in
There is a 4 second, 2 mAh delay between my computer and the iCharger with data logging on my computer, but this shows that the battery PCB protection did kick in and the disconnected from the battery reading 0.0 volt as it should.
It does take time for any battery protection to kick in and it often can not be kicked in with very low current draws as i have made this mistake before when testing batteries and have said to protection does not work, when it did it just did not work say at 0.5 amps.
This test is like testing a dead short the battery but slower if that makes sense in a dead short the amps climb high very very quickly and the battery protection kicks in after a short time, but in a discharge test it takes time for the the charger to ramp up to the Maxim discharge for the protection to kick in.
I could of done the test shorting the battery out with a DMM (digital multi meter) the protection would of kicked in sooner but unless i made a video there is no real way of logging or recording to PCB disconnecting its self from the battery.
Their 6.8cm (2.68in) according to manafont and DX. I wonder how these compare in length to the King Kongs (I can't find their measurements anywhere). It is known that the King Kongs are a good fit for some flashlights out there and the trustfire 26650 might be too long for stock fitting.
Thanks Benkie. The reason I asked is whether they would be to long for my JM05. The 2 x King Kongs that I have with a small magnet between them measure 132 mm in length. 133mm would be about all the length that would fit in this torch. 2 x Trustfires would be 137.46mm which would be a no go. The protection is probably what adds to the length. Cheers.
King kongs INR,s 65.63mm in lenght and 26.03mm wide
From what i can gather the protected trustfire 26650 will fit and work with the TR-J12 and the A8, i think lights build before the protected cells where around might be a bit short.
Now DNF you have to donate to the battery test and strip for all these question's and because you like holdens.
hi, would it be okay to use just 2 of these TF 26650s on the J12 as a long term solution? I'm currently using 3x18650s (TF 3000). No issues here, just that the shorter form-factor is better IMO but I'm concerned about the strain on the batts if I use only 2. thanks.
Should be no problem, I plan to run 2 to 3 of these in my TR-J12, 3 would be better for sharing the load and give around 2 hours of run time on high, the TR-J12 fairly suck,s the amps with two cell,s
Remarkable how their Anodizing has improved since my TF C8.
This is what prompted my queston by the way...
xed888 wrote:
Are you guys saying that this torch shouldn't be used in a 2x18650 setup? Or just don't use crap cells in a 2x18650 setup?
ergotelis wrote:
Just don't use crap cells. But personally, i wouldn't use even good 2x18650, because the stress to the batteries is quite high, they might end up loose their performance much earlier.
I'm going to do a 1 amp discharge test for comparison as there is a lot of people out there that have hobby chargers that can only discharge to a 1 amp and Ive seen a few discharge test at 1 amp, so i thought ill do one for comparison.
After that is there any other test people would like see done on this battery before i pull of the PCB (protection circuit) to see how many mosfets the PCB has and to see if there is any usable information written on the cell ? I do have some more coming so i will do some discharge testing on them as well.
If people are wondering how i come up with the above data table's and graph's i posted on this battery test, i data log using my icharger 106b+ connected to my computer for my battery tests, i use a program logVeiw V2.7.4* with icharger 106B+ with firmware v3.14 upgrade and then re-calibrated the charger's main charge lead's voltage and balancing port voltage.
I use this program for my data log,s and for the data charts i post
I use the data tables and graphs because i find it simple and think it would be easy for other people to read and the data tables includes charge time updated every 2 seconds, voltage, watts, energy, mAh, plus the data tables include induvidual cell voltage for up to 6 cells, internal temp of my charger, battery temperature, the chargers input voltage from the power supply and so on and i can not get all that information on one graph.
With the data tables i usually only include the end of the charge cycle then hit the print screen button on the key board while the logVeiw program is running and open on the screen of my computer, save the image in paint, then crop the image down with Microsoft picture it! then up load the image to photo bucket then post the image on the thread, the same process for uploading the graphs.
On data tables cut out things like battery and charger temperature and individual cell voltage if I'm only doing one cell at a time to test, data tables are my favorite but the graphs shows how well the cells hang on to there voltage while discharging.
