My Tenergys 4@$14.99 beat the Xtar and TF flames in output, delivery time and price. USA free delivery. http://item.mobileweb.ebay.com/viewitem?itemId=190593454405&index=2&nav=WON&nid=40445031411&trxId=600472031009
+1 Loving my Tenergy's . They give out some juice! For $ 3.75/cell you cannot beat it. (Free US shipping)
+1 Loving my Tenergy's . They give out some juice! For $ 3.75/cell you cannot beat it. (Free US shipping)
atbglenn one mosfet there by the looks but they dont trip with over discharge...
@ ilikeflashlights whats there internal resistance and how much mAh do they take ?
@ willie & gen1.3_ whats there internal resistance and how much mAh do they take ?
i ran a data log of a discharge and charge cycle last night but i stuffed up and unit didnt save i think i need more time to figure out the data logging with this icharger lols
today im trying again with 2 x TFF in series with a balance set up this is a picture for refernce and is not the actual picture of the voltage of the batteries im discharging.
sofar
the starting voltage under load was cell #1 is 3.814 cell #2 is 3.816
voltage now is cell #1 is 3.543 cell number #2 is 3.528 amount of mAh taken out @ 1 amp load is 1562 mAh
remember these batteries where used not fully charged and they are under a load of 1 amp and becuase they in in series the mAh is combined as one battery so the mAh will only be equal to one battery e.g 2400, but if it was in parrallel it would be double e.g 4800 mAh.
if the batteries where fully charged the voltage would be higher and the the mAh would be higher, but 1562 mah with in 0.3 volt is not bad and by doing this in series with balance leads i can monitor each cell,s voltage internal resistance
Internal resistance of cell #1 is 149 cell #2 is 162 milliohms
but you have to take into account these are well used cells and the resistance of my soldering, the battery holder and the cheap balance leads ive used
start of the discharge @ 1amp to 3v
end of the disharge @ 1 amp to 3v (remember these can go down to 2.75v)
graph for cell #1
i need more time to play with data logging
resting voltage of the cell,s was 3.7v so ill start a discharge now in lilo mode to 2.75 volt per cell @ 0.5 amp
I can only offer anecdotal evidence but Flames are not my favorite. They're great for the price I guess but they pull the lowest amps of all my batteries and seem to discharge the fastest. I will also add an equally unscientific opinion about AW. I have a couple of AW/IC 18650/2900 mAh and other than a little better run time and great wrap, I'm not impressed. Especially at $18.75 each.
I like the Xtar 18700, the Reverend's unprotected Panasonics and Solarforce protected.
notbatterysmartFoy
end of discharge in lilo mode (li-ion) from 3v to 2.75v at 0.5 amp
short and sweet ? i did run the charger for about 5 mins in the wrong mode at first but it did not take out much mAh
ill start a balance charge cycle now in lipo mode to 4.2v @ 0.5 amp
you could be on to some thing there foy i pull lower readings then every one else even when using the same batteries my single 18650 lights could be under driven as thats what i expect.
im going to pull of a couple of pcb,s as see if that makes a diffrence and if its limitting current flow and so i can check if mine have one mosfet or two.
im goign to try some redlist,s bit on the ouch side $ wise ill give them a run with xtar or hi-max and see how they go.
I don't like Flames that much but they're not as bad as what I've read about those red UltraFire "3000" mAh 18650s. Seems they were involved in more than one venting-with-flame incident. I have two that came as part of some long ago purchased package and I've hardly used them at all. Probably are okay but I have so many others, they never get used.
Have you had any experience with those red UFs or know why they have a somewhat bad reputation?
Foy
i have personaly not tryed the red UF,s but i have read they are not that good and take less then the claimed 3000 mAh i might buy a cheap pair of ebay for a laugh.
i have tryed other UF,s while they take around 60% less then claimed mAh rating the pcb,s worked well low cut off voltage worked well every time i tested it and they give higher amp draw test,s then my TFF batteries but they sag more.
since the low voltage cut off works well even though they only take 900 mAh out of there claimed 2400 mAh i have kept them, well the good ones and given them to my old man since he is less likely to keep an eye on things like me.
ill admit im still pritty new to 18650 and ive only tryed a few cheap type,s but the flames seam to do what's claimed with mAh and work well in multible cell set ups and provide long run times, i will buy more diffrent cell's to see if its my single cell lights that draw low or my cell's so i have some thing to compair to.
im still getting use to these high resistance 18650 cells as a used and abused lipo to me is just about worn out with the internal resistance of 16 milliohm per cell and these 18650 cells are from 100 to 200 milliohm when new per cell.
I have over 30 18650 protected flames and they all average about 3.5 amps on high the 2 unprotected ones I have kick out 4.5 amps. I am very happy with the performance of these for the price.
do you use moded DMM leads ?
When I get home the charge test should be done
2 x TFF balance charge data tables for 8.4v 0.5 amp charge, these are a bit low, i know these test higher when i charger them one by one, remember these are used cell,s
start of the charge cycle
end of the charge cycle
some squiggly lines
these are used cells i might even go as far as saying they have had a bit of a hammering with long constant runs and high amp charge and discharge test when i first got them but to take 2250 mAh from 3.5v to 4.2v is not bad for used cell,s and i know the take more mAh when charged one by one then group balance charges.
I have a newer model Turnigy 8150 and it no longer has/comes with USB or temp sensor, so no data log. If I remember gen1.3 did a tail cap amp pull measurement and found the Tenergy out performed the Xtars. I did all my discharge readings at 2.0ma to 3.0v and Tngys tested 2700-2800ma. These are being sold by a liquidator with a limited quanity hence the good price. By the time exhaustive test are run these will most likely be sold out. What is your reason for the resistance readings? Are you looking for matched cells for pack use? BTW thanks for the graphs..... the icharger rocks!
Foy,
Since there seems to be a large following that like the TF flames, I guess the question is, are the only ones you purchased those from the DD sale? Just wondering if you happened to have bought a fake pair (or multiple pairs). I am looking at this from a disinterested outside party, but it seems to me that the TF Flames bought from some dealers, there seems to be more of a variety of opinions on them while those bought from more reputable sites the views are far more favorable. That would seem to me there are fakes being sold from the less reputable dealers (?).
Just putting that out there, still looking to purchase my first 18650 light.
jonhobart -
I got mine from Manafont, in April I think. There's nothing horribly wrong with them, I've just bought cheaper batteries that seem to perform better. I must stress however, this is all just casual observation . . . I have no actual proof other than higher tail cap amps, which can hardly be used by itself to judge a battery.
I think maybe we should buy batteries based on looks alone and I think the Xtar 18700 is the best looking, therefore,
itisthebestFoy
10-4 Foy. Manafont was where I was leaning toward buying my TF Flames from because of the iffy quality people get from DX and other sources. Seems like some sources get more TF Flames with problems than others, putting 2 and 2 together, I figured those places bought fake TF's. My thinking is that I'd rather spend a little extra and get them from a place that has a good reputation and likely does not sell fakes. This is also why I am leery from buying batteries from Ebay.
im looking for resistance reading's for a few reason's i belive it has to alot ot to with how much current the battery will give or not give, the resting voltage of the cells the life of the cell and for mutli cell use,s and how the cell,s charge, hold charge and discharge and any one that can give a resistance reading must be using a half decent charger so there is no quess work in how the cell,s perform
im doing test 4 of a 18650 trustfireflame battery now ill post up the results once the icharger has done its stuff.
while waiting for the next charge cycle i decided to kill a good 18650 trustfireflame battery to see what the pcb is in it and to see if it made a diffrence with current draw.
you can see it has two mosfet's installed and on a under driven P60 UF 3 mode drop in and TF C8 i have with out the pcb (IC) there was aproxx 0.07 amp (70 milliamp) increase in current draw lol about whats i expected