Battery for my sigma buster 600- Mtbr.com
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  1. #1
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    Battery for my sigma buster 600

    My Sigma Buster 600 battery is Dead. I am trying to find a replacement with not much success. It is an 18650 cell but it's a rare bird. It has the positive and negative contacts on the same end. I took it to my local Battery Specialist Store called Battery Source and they couldn't help. My online Searches have produced nothing. Any help is appreciated. Thanks

  2. #2
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    Show us a pic and post some measurements

    Btw, when did you buy it? Don't you still have warranty?

  3. #3
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    Maybe call them...
    Service Hotline North America
    SIGMA SPORT USA
    1860B Dean St.
    St. Charles, IL 60174
    +1 630-945-3387
    Proud Tribe member since 1992 - looking for better singletrack to be ridden year round

  4. #4
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    I have called them and get a recording saying they can't come to phone now and please call back. I also sent an e-mail but also no reply so then I turned to asking for help here. I have taken pictures of the battery but I can't figure how to post the pictures. Thanks for the suggestions.

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  6. #6
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    Thanks for that link! They seem to be a great source for batteries and I'll call them Monday and see if they have a match for my strange battery with both the positive and negative poles on the same end. Happy Thanksgiving to All!

  7. #7
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    Quote Originally Posted by Flbobcat View Post
    My Sigma Buster 600 battery is Dead. I am trying to find a replacement with not much success. It is an 18650 cell but it's a rare bird. It has the positive and negative contacts on the same end. I took it to my local Battery Specialist Store called Battery Source and they couldn't help. My online Searches have produced nothing. Any help is appreciated. Thanks
    Sorry but I can't figure how that link was any help to you. The standard 18650's are either flat top or button top. I've never seen an 18650 cell with both terminals on the top. Your only option as I see it is to buy a replacement cell from the seller or rig one yourself using an 18650 with TABS. With tabs you can solder in your own wires. How of if this would work for you I have no idea. All depends on how the terminals hook up with the lamp and what type plug ( if any ) is being used. A photo would help big time. FWIW you can buy tabbed Panasonic 18650 cells on Amazon ( last time I checked ).

  8. #8
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    It's helpful because it's an option to call a Battery supplier and describe my Battery and see if they have it. I've tried to find my Battery on Amazon but can't definitely match it. My best hope is for Sigma U.S. to respond to my e-mail. It's a Samsung battery so I know it has a Brother somewhere I just have to find it. THANKS

  9. #9
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    Is this your review and pics on Amazon?

    Seems to me it's likely just a contact plate connected to both negative and positive (there could be a protection circuit under it too). There is no need to feed a wire or strip up from the bottom of the cell since the case of the cell itself provides negative. See this review of these weird protected Sanyo cells from DX that have the protection circuit at the top of the cell (I have some of these cells myself). The last pic in the O.P. (4th pic) shows the positive and negative contact to the pcb.

    Looking at the pics on Amazon, it does seem to have something under that shrinkwrap at both ends (protection circuit on bottom and contact plate at top???). I'd like to see more, but you'd have to post pictures AND it would require the very dangerous act of cutting away the shrinkwrap to see what's going on. If you're brave and can remove the shrinkwrap without shorting things we may be able to help (maybe slit shrinkwrap with something non-conductive). Beware that soldering on Li-Ion batteries is also very dangerous.

    To post pics you can upload them to a photohosting website and then post the link here. This site also allows some photo uploading (though I don't use it). Click the "Go Advanced" button at the bottom of the text window, then use the "Insert Image" icon, then you can try the "From Computer" tab, then click "Basic Uploader" at the bottom right, then browse & upload your image. If you need to use a photohosting site, you can upload to IMGUR without even having an account setup (https://imgur.com/) - click "New Post" - "Upload Images". Upload your image, then once it appears on IMGUR, you click the "COPY" button to the right side of the image where the link is and paste it into the forum's "Insert Image" - "From URL" tab entry and deselect "Retrieve remote file . ".

    I don't think you will find a direct replacement cell with that contact plate from any other source than the manufacturer.

    Hope this helps!
    -Garry
    "My Bike Lights" Thread on BLF teardowns, measurements, and beamshots. Moving my photos, PM or post up if you can't see them.

  10. #10
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    Garry, if the battery is dead, then there is no danger cutting wrappings whatsoever. Shurely it could be just protection that kicked in. Applying some charge would answer that.

    And yes, pictures would tell us much more. There is possibility to do some work and just replace dead cell.

  11. #11
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    Quote Originally Posted by ledoman View Post
    Garry, if the battery is dead, then there is no danger cutting wrappings whatsoever.
    Sure, I was just erring on the side of caution.

    -Garry
    "My Bike Lights" Thread on BLF teardowns, measurements, and beamshots. Moving my photos, PM or post up if you can't see them.

  12. #12
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    There's a Video on YouTube called Inside Sigma Buster 600. It clearly shows the inside of my light and both ends of my Battery.

  13. #13
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    This is not helpful. The only good thing is knowing the cell can be replaced. So as said, we need pictures of battery unwrapped.

  14. #14
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    Quote Originally Posted by Flbobcat View Post
    There's a Video on YouTube called Inside Sigma Buster 600. It clearly shows the inside of my light and both ends of my Battery.
    For the lazy people: https://www.youtube.com/watch?v=XJtc7uNuo3Q

    Still looks to me like a protection circuit at the bottom and a contact plate at the top.

    -Garry
    "My Bike Lights" Thread on BLF teardowns, measurements, and beamshots. Moving my photos, PM or post up if you can't see them.

  15. #15
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    Idea!

    TO didn't want to show pics, but at least now there's the link to the youtube video.
    Anyway, with warranty for the product this thread isn't really neccesary.
    But maybe someone has ideas to modify the light for accepting standard 18650 cells?
    Last edited by angerdan; 11-20-2017 at 03:57 PM.

  16. #16
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    Yes Garry that's my review and pictures on Amazon. I did make contact with Sigma and I might have a warranty claim. We'll see. In conversation with the Sigma rep he tells me a replacement for my 18650 cell can't be had because it's a proprietary cell built to their specs by Samsung. There's no aftermarket source. When it goes bad you replace the whole light. It seems weird they just can't send me a new cell. I'll keep y'all informed on how this goes. Thanks Robert

  17. #17
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    Robert,
    If you're at a loss with Sigma and unsure what to do and you're not in a rush you can send it to me (probably only need the battery) and I can see what I can do to get you a replacement cell made up. I can't guarantee I can make one, nor can I guarantee turnaround time, but I can try if you'd like. Shoot me a PM if you want to go that route. See what Sigma says about a warranty claim first.

    -Garry
    "My Bike Lights" Thread on BLF teardowns, measurements, and beamshots. Moving my photos, PM or post up if you can't see them.

  18. #18
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    Garry, I'm shure the mod is quite easy. Just need to contact negative side to the circuit at right point. Or maybe just cut cell wrapper keep top contact and replace the cell. I know you can do it

  19. #19
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    Yeah, I've just learned not to take on things like this as being really easy. One thing I don't have on-hand is 18650 shrink wrap (though I have regular shrink wrap which is a bit thick. I would also take the opportunity to use a higher capacity cell. The talk of "proprietary cell made by Samsung" sounds like bullcrap. I doubt Samsung added the top plate and there's no reason the manufacturer can't provide just a new cell.

    Now there could be an issue where that top plate contains some sort of circuitry that is actually "bad" and the cell is actually good.

    -Garry
    "My Bike Lights" Thread on BLF teardowns, measurements, and beamshots. Moving my photos, PM or post up if you can't see them.

  20. #20
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    After looking at the youtube link it still has me scratching my head. I'm still trying to figure out how the negative terminal is able to contact the lamp. The front of the battery looks like it has the potential to provide +/- contact but I only see the spring in front for the positive contact. If there is a negative contact on the top of the battery I'm at a loss to explain how it makes contact with the lamp.

    Interestingly, the guy who did the video claims to have replaced the battery with a Panasonic 3400 mAh cell. He doesn't mention making any mods.

  21. #21
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    There are two metal tabs on the base by the spring which protrude and contact the outer ring of the cell? Garry is the negative contact the outer ring. I missed his comments about replacing the battery and now I'm curious and puzzled how he did it. Thanks for being more observant than me. I don't know how to find out what Panasonic cell he used.

  22. #22
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    It doesn't matter which 18650 cell he has used, you can use any. It is how they put that contact on the top of the cell. I just don't get it why you can't unwrap and make pictures. We can't help you otherwise.

  23. #23
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    Yes, the outer ring should be the negative contact.

    -Garry
    "My Bike Lights" Thread on BLF teardowns, measurements, and beamshots. Moving my photos, PM or post up if you can't see them.

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