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Thread: Feilong Li-Ion 32650 cells TESTED!

  1. #1
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    Buttrock Feilong Li-Ion 32650 cells TESTED!

    For years it has been doubted that a quality 32650 (D size) Li-Ion cell exists. I believe these Feilong cells are exceptional.

    Also, I am still doing testing so more info may be added later. I am interested in doing testing at more levels and very interested in seeing how the cells' capabilities hold up after more cycles. So far they seem to be getting a little stronger with experience (that's a nice way of saying "with age".)

    Here are the discharge test results.

    Amp-Mah
    1- 5612
    2- 5580
    3- 5539
    4- 5559
    5- 5501
    7- 5404
    10-5384 (I also tested a brand new MNKE IMR26650 cell at 3784Mah at 10a)
    13-5226

    Here is how the running voltage held up under load at 5, 7, 10, and 13a.

    Min-Volt-TempF
    -----------------
    5a test
    5- 3.78
    10-3.72-83
    15-3.68
    20-3.63-89
    25-3.59
    30-3.55-92
    35-3.50
    40-3.43-94
    45-3.36
    50-3.30-95
    55-3.24
    60-3.15-98
    65-2.88
    5501 Mah

    7a test
    5- 3.74-87
    10-3.68-92
    15-3.62-95
    20-3.56-98
    25-3.45-100
    30-3.37-103
    35-3.28-105
    40-3.19-108
    45-2.94-111
    5404 Mah

    10a test
    5- 3.54-96
    10-3.48-107
    15-3.40-117
    20-3.29-123
    25-3.18-128
    30-3.01-134
    5384 Mah

    13a test
    5- 3.48-101
    10-3.40-117
    15-3.27-130
    20-3.11-140
    24:08 finish
    5226 Mah
    149F

    This cell holds up remarkably well to higher currents, IMO. On the 10a testing it ran much longer (42% more capacity!), stronger (less voltage sag), and far cooler than the highly regarded MNKE IMR26650 cell. I realize that it's much larger but it's still very impressive to me.

    I will add a breakdown of the voltage drop and temperature rise for the 5,10,7,&13a discharge tests later when I get a few more minutes.

    THESE CELLS CAN BE BOUGHT HERE...FEILONG 32650!
    Last edited by Colonel Sanders; 05-11-2012 at 10:18 AM.
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  2. #2

    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Awesome...

    Looking good even at 13 Amps! Will you test at even higher currents? (never mind, more than that not needed!)

    Thanks for your work testing these!

    Looking forward to updates...

    Edit: I have been told that in order to keep the battery thread in the market place, that I needed to pay dealer fees.

    And I don't make enough off of these batteries to be able to pay $75 dollars per month.

    So unfortunately, the only alternative is to remove the thread. I regret that this will have to be the only choice.

    But for those looking to get some of these great cells, you can go here!
    Last edited by jayrob; 05-11-2012 at 01:18 PM.

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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    "Will you test at even higher currents?"

    I certainly can but...how hot is too hot for a cell to get? It hit 149F right at the tail end of the 13a test which is where the 26650 was at 10a. And, how high is as high as a flashaholic is likely to need?

    I did the 13a draw because fellow flashaholic "bstrickler" is planning a build that may go as high as 13a and is looking for a cell to support it (yikes! Gonna be a bright one I suppose!)
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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Quote Originally Posted by Colonel Sanders View Post
    "Will you test at even higher currents?"

    I certainly can but...how hot is too hot for a cell to get? It hit 149F right at the tail end of the 13a test which is where the 26650 was at 10a. And, how high is as high as a flashaholic is likely to need?

    I did the 13a draw because fellow flashaholic "bstrickler" is planning a build that may go as high as 13a and is looking for a cell to support it (yikes! Gonna be a bright one I suppose!)
    Oh sorry, I meant for short duty. Like 3 to 5 minutes...

    But your right, I don't think we need anything that will give over 13 Amps!

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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Quote Originally Posted by jayrob View Post
    Awesome...

    Looking good even at 13 Amps! Will you test at even higher currents?

    Looking forward to updates...
    I wouldn't advise it. LiCo cells are not designed for discharge currents above 2C. For these cells it looks like that would be about 11A.

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    Default

    I've been using a pair of these in my Mac's 3300L. It pulls 9A on full belt, and anecdotally, at least, they do certainly handle it well.

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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    I'm going to guess the reason the 2A run was due to a charging inconsistency, as I fail to see how a battery's capacity would be larger at a higher current drain.

    Thanks for doing the 13 amp run! I wasn't sure it would handle that high of current. Man, if only Mag still made 7D lights!

    I don't think I should turn that on at night in public, for fear I'll be arrested for brandishing a deadly weapon!
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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Quote Originally Posted by bstrickler View Post
    I'm going to guess the reason the 2A run was due to a charging inconsistency, as I fail to see how a battery's capacity would be larger at a higher current drain.
    In this case you are probably correct, but the capacity can be higher at high current as you can see in some of my battery tests.
    Reason: Battery works better when warm.
    My website with flashlight, battery and charger information: lygte-info.
    More than 200 battery reviews and 80 charger reviews.
    Compare 18650 LiIon batteries or smaller (RCR123, 16340, 14500, 10450) LiIon batteries.

  9. #9

    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Quote Originally Posted by bstrickler View Post
    I'm going to guess the reason the 2A run was due to a charging inconsistency, as I fail to see how a battery's capacity would be larger at a higher current drain.

    Thanks for doing the 13 amp run! I wasn't sure it would handle that high of current. Man, if only Mag still made 7D lights!

    I don't think I should turn that on at night in public, for fear I'll be arrested for brandishing a deadly weapon!
    Just wanted to mention that 2 of these will fit a 2D Mag with no special modification. (just clip the tail spring a little shorter)

    But that they are a little longer than a normal D sized battery. (length is 66.5mm - normal D is 60.5mm)

    So I believe even a 3D will need a tail cap mod...

    Edit: I just checked, and with the tail cap mod shown in my PT-54 thread, you will barely be able to fit 3 of these Feilong cells into a 3D Mag...
    Last edited by jayrob; 05-14-2012 at 10:03 PM.

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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    "I'm going to guess the reason the 2A run was due to a charging inconsistency, as I fail to see how a battery's capacity would be larger at a higher current drain."

    It wasn't the charging. As HKJ mentioned, some cells work better when warm. This applies not only to the cells internal heat that is generated during discharging but also to the outside temp (as in, the cell will perform better when it's 100F than when it's 30F.

    Anyway, I agree with HKJ that increase heat probably wasn't the case here but neither was state of charge (I've been very careful with that.) No, the real reason that the 2a run was a little slack is becuase it was only this cells' second cycle. The 1a run which was the very first run out of the box was even worse and is why I didn't include it here. It takes several cycles before a cell reaches it's maximum potential. I have found that to be the case with LiCo cells but I really haven't tested this on the other Li-Ion chemistries. (Perhaps one of the experts here can add to this.) I'm going to try to determine about how many cycles it takes to reach maximum capacity.
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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    "So I believe even a 3D will need a tail cap mod or possibly a 4D host cut down, etc..."

    I have long used 3 x 26650s in a 3D. I will check and confirm if this is possible with these cells. If it's not it would be because the D cell is too fat to reside within the tailcap.
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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Quote Originally Posted by mvyrmnd View Post
    I've been using a pair of these in my Mac's 3300L. It pulls 9A on full belt, and anecdotally, at least, they do certainly handle it well.
    Was yours built without the 26650 spacer tube or did you remove it and if so, how? I'd like to run these in my Mac's 3840L.
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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Quote Originally Posted by Colonel Sanders View Post
    "So I believe even a 3D will need a tail cap mod or possibly a 4D host cut down, etc..."

    I have long used 3 x 26650s in a 3D. I will check and confirm if this is possible with these cells. If it's not it would be because the D cell is too fat to reside within the tailcap.
    I've machined tail caps out to fit the protected cells which are even longer than these... But you can only machine in to a depth of about .235 in. or so. Because of the o-ring groove. If you go deeper, then you will probably ruin the tail cap...

    See pictures here in this thread:
    9 Amp PT-54 Phlatlight Maglite Mod!

    Edit: I just checked, and with the tail cap mod shown in my PT-54 thread linked above, you will barely be able to fit 3 of these Feilong cells into a 3D Mag...
    Last edited by jayrob; 05-14-2012 at 10:04 PM.

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    Flashaholic* mvyrmnd's Avatar
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    Quote Originally Posted by Colonel Sanders View Post
    Was yours built without the 26650 spacer tube or did you remove it and if so, how? I'd like to run these in my Mac's 3840L.
    Mine came with the spacer, but it wasn't glued in or anything. Just take the head and tailcap off the tube and push it out.

    If yours is glued in, I'd stick the tube in a bench vise, and use a hammer and screwdriver to push it out.

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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Thanks, I didn't realize the head would come off. I've tried before but I didn't really "get on it" good. I'll give it a more aggressive shot.
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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    I have been told that in order to keep the battery thread in the market place, that I needed to pay dealer fees.

    And I don't make enough off of these batteries to be able to pay $75 dollars per month.

    So unfortunately, the only alternative is to remove the thread. I regret that this will have to be the only choice.

    But for those looking to get some of these great cells, you can go here:
    FS: Feilong 6000mAh 32650 Li-Ion Batteries - Laser Pointer Forums - Discuss Lasers & Laser Pointers
    Last edited by jayrob; 05-06-2012 at 06:27 PM.

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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Jay, are you saying that I have to remove this thread? Or I just have to remove my link to your Marketplace thread?

    We are allowed to test cells and report our findings, no?
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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    No one has contacted me about this thread (it is my thread afterall) so I don't know what's going on.

    MODERATOR, do you want me to delete the link to Jay's sales thread? Thanks.
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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    I don't think your review thread is in question. Just my sales thread in the market place. I would need to pay dealer fees. Which I don't make enough off of the battery sales to pay $75 per month. So the sales thread will get deleted I am told...

    I just wanted to mention a link to the same sales thread located at a different place. So that people who are reading your review will know...

    Can you just edit the link in your first post to point to the other location instead of the market place?

    At least I think you should be able to share a link to an item being reviewed. Correct?

    Otherwise, what good is a review if people don't know how to find the item being reviewed??
    Last edited by jayrob; 05-03-2012 at 09:57 AM.

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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Oh, I see. I will wait for the higher ups to make the call on linking to an outside sales thread but I don't think that is allowed.
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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Quote Originally Posted by Colonel Sanders View Post
    Oh, I see. I will wait for the higher ups to make the call on linking to an outside sales thread but I don't think that is allowed.
    Hmmm... Seems strange if you can't review anything and not show a link to where you got it??

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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    More info added.
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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Great review on these cells. Jay built me a triple XML 6D Mag with 5 of these in it and it's super bright, and gets LONG run times!
    Judging from your results, I should have no problem doing a big Incan build.... Been wanting to use the 5 cells I have to push an Osram 64456 instead of using an adapter with 18 AA Nimh cells

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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Colonel Sanders, another CPF'er recommended you and your testing setup.

    I am strongly considering ordering two Feilong 32650 3.2v nominal LiFePO4 cells, with a claimed 5000mAh capacity.

    My application calls for only 205mA draw per cell, so I am hoping I may actually get between 4500 and 5000mAh.

    However, there is no data on the web concerning these, other than the fact they exist.

    1) If I purchased two of them, would you be willing to run some discharge tests at, say, 350mA, 500mA, one amp, three amps, and five amps?

    2) If so, would you be willing to publish those results in this thread?

    I am hesitant to spend the money on an unknown straight from China, but I have benefited from others doing this so many times,
    I'd be willing to take a chance.

    jayrob has stated that the more recent batches of Feilong 32650 3.7v cells (lithium cobalt) have seen a decrease in quality, and I am extremely curious as to whether the Feilong 32650 3.2v LiFePO4 cells are worth anything at all...
    Last edited by LEDAdd1ct; 02-23-2013 at 06:40 AM.
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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Sure, I'd be glad to test them for you. I think since they are a different cell I'd start a new thread for reporting their results.

    I'd also be curious to know about the decrease in quality of the LiCo 32650s (I have been thinking about buying a few more.) Jayrob, what's up with the latest cells?
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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Okay, thank you.

    I'll start a new thread called "Feilong 32650 3.2v LiFePO4 Cells" when I get them and reserve the first post,
    then ask you to PM me your mailing address to send them your way to be evaluated.

    jayrob pointed me to this thread, so hopefully he can answer your question about the decrease in cell quality.

    EDIT: Order placed for two Feilong 32650 3.2v LiFePO4 cells. Will start thread and forward them to you once received.

    EDIT #2: It suppose it makes more sense for you to start the new thread. Looking forward to getting these!
    Last edited by LEDAdd1ct; 02-23-2013 at 08:40 AM.
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  27. #27

    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Quote Originally Posted by Colonel Sanders View Post
    Sure, I'd be glad to test them for you. I think since they are a different cell I'd start a new thread for reporting their results.

    I'd also be curious to know about the decrease in quality of the LiCo 32650s (I have been thinking about buying a few more.) Jayrob, what's up with the latest cells?
    Well I never had the new Feilong cells tested like you did with the early ones, but let me tell you why I made the statement that they were not the same quality...

    I build 1000 lumen Mag mods, and the 2 cell builds are just fine with the newer Feilongs. Because that build uses a buck driver, and with 2 cells, it only needs to draw about 1.5 Amps from the supply.

    But with my single cell builds using a 3 Amp linear driver, the newer style Feilongs did not give me good output. I would only be able to get maybe 2.2 Amps.

    I am now stocking the new 6000mAh 32650 cells from KD. They are proving to be good quality. I can put one of those in one of my single cell builds even at storage voltage of 3.8, and it still gives 3 Amps. So that tells me that it is a quality cell.

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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Quote Originally Posted by Colonel Sanders
    Sure, I'd be glad to test them for you. I think since they are a different cell I'd start a new thread for reporting their results.
    Surprise! The cells came today.

    I'll try and get them out to you for testing tomorrow.
    "...and the diode multiplied and grew in brightness. And God saw that it was good."

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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Okay, Colonel, they are on the way!

    I paid extra for the USPS Small Flat Rate box, even though I could have saved the cash by using my own box.

    I wanted to get them out to you today.

    I also included six dollars cash for you to use a USPS Small Flat Rate Box to return them to me.

    Very much looking forward to your test results.
    "...and the diode multiplied and grew in brightness. And God saw that it was good."

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    Default Re: Feilong Li-Ion 32650 cells TESTED!

    Cool. I'll do my best to tell you what you want to know. Any details of how you want the tests done? Most importantly, what discharge rates do you want to use and at what voltage do you want the tests stopped?
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