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  1. #1
    Senior Member no motor?'s Avatar
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    2 Magicshine questions.

    1) People recommend waterproofing the battery, but my came shrinkwrapped in black plastic. Is mine a later model that came waterproofed, or do I need to ad something to what I have? I was going to put electrical tape over the battery, but I don't think that would do much good and plan to put the battery in the trunckbag if it rains when I'm out.

    2) I took my first ride with it over the weekend, and it is bright!! The temp was in the low 40's and foggy out, and I still had plenty of light. My old trusty Fenix L2D on my helmet and my new Terralux on the handlebars both suffered from the affect of the cold on my rechargeable NiMH batteries, is the Magicshine battery affected by the cold like that too?

  2. #2
    Seņior Member ItsJustMe's Avatar
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    They're all shrinkwrapped. It's not enough. It's not watertight.

    I put electrical tape over the gaps. I don't know if it's "enough" but it can't hurt.

    LiIon is affected but not as much as NiMH. My tests indicated my runtime went from 3:15 to about 2:30 at 5*F (in my freezer last fall).

    One warning for new owners: The weak link is where the wire attaches to the connectors and to the light. Do not stress these points. When disconnecting, pull ONLY ON THE CONNECTORS - apply no pressure to the wire itself.

    If your connectors do not come apart easily, do something about it. They should offer a LITTLE resistance, but not much. Mine came with connectors that were quite difficult to pull apart, and as a result even when exercising caution I wound up pulling on the wires a little. They haven't stopped working but they're frayed.

    I've ordered some spare extension cables from Deal Extreme - then I will have spare male and female connectors when the originals wear out. I got them from DX since I don't care how long they take to get here.
    Work: the 8 hours that separates bike rides.

  3. #3
    Senior Member rumrunn6's Avatar
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    I would be cautious about waterproofing it yourself. you might create a worse problem, meaning you may not waterproof it and might wind up making it a water trap - whereby the water that gets in evaporates more slowly due to your wrapping.

    the 40s is not cold (not too cold for the battery to suffer)

    we all rode the winter with it and they did fine, right guys?

    I wrapped mine in some bubble wrap before stuffing it into the water bottle for shock padding and some thermal protection.
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  4. #4
    Senior Member Iowegian's Avatar
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    Quote Originally Posted by rumrunn6 View Post
    we all rode the winter with it and they did fine, right guys?
    Yup!

    The waterproofing issue affects the protection PCB that is on top of the battery pack inside the shrinkwrap. It takes just a drop of water in the wrong place to ruin it. I wouldn't be surprised if heavy condensation did the same.

    There are lots of ways to waterproof the battery pack (see above) but don't count on the black shrinkwrap to be enough.

  5. #5
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    Quote Originally Posted by rumrunn6 View Post
    I would be cautious about waterproofing it yourself. you might create a worse problem, meaning you may not waterproof it and might wind up making it a water trap - whereby the water that gets in evaporates more slowly due to your wrapping.

    the 40s is not cold (not too cold for the battery to suffer)

    we all rode the winter with it and they did fine, right guys?

    I wrapped mine in some bubble wrap before stuffing it into the water bottle for shock padding and some thermal protection.
    I have about 20 hours of heavy rain exposure to my Magicshine batteries. With just a bit of liquid electrical tape on the wires and cells, I have not had one problem with water incursion. One battery was kept in a seat pouch, but I just wrapped the other around the top tube.

    The only problem worth noting is that the 5 mode Magicshine light interferes with my Sigma bike computer cadence as the voltage wanes and the regulator boosts current to maintain wattage. The older 3 mode light does not cause this problem.

  6. #6
    Erect member since 1953 cccorlew's Avatar
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    Sigma vs MagicShine. I gave up and bought a wired computer for my commuter. I've got a big ride coming up and I'm hoping that putting the battery in teh seat bag will be enough to let the sigma work. Confidence is low. Testing begins this weekend.
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  7. #7
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    Quote Originally Posted by no motor? View Post
    1) People recommend waterproofing the battery, but my came shrinkwrapped in black plastic...
    As did mine. To be sure of it's waterproof-ness, I siliconed it as many here and elsewhere have recommended. Then, after doing that, I plastidipped it. It doesn't fit in the original holder anymore, but I'm confident that it's absolutely, 100% waterproof.

    Re the holder: I cut one side and the bottom seam on the holder. I then secured the extra large battery (extra large due to the plastidip) in the original holder by wrapping one or two velcro straps around it.
    Last edited by hopperja; 03-19-10 at 11:26 PM.
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  8. #8
    Senior Member GeoMan's Avatar
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    The new Magicshine 1400 includes a new sealed battery configuration with a nice neoprene case. Here's a nice teardown and review on MTBR.
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  9. #9
    Senior Member rumrunn6's Avatar
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    good grief. its an urban myth that anything worth doing is worth doing to excess. if ur so concerned with seeing where you are going then ride during the day.
    Last edited by rumrunn6; 03-21-10 at 07:57 AM.
    cycling is like baseball ~ it doesn't take much to make it interesting

  10. #10
    Galveston County Texas 10 Wheels's Avatar
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    Quote Originally Posted by rumrunn6 View Post
    good grief. its an urban myth that anything worth doing is worth doing to excess. if ur so concerned with seeing where you are going then during the day.
    What?
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  11. #11
    Senior Member no motor?'s Avatar
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    Question

    Quote Originally Posted by 10 Wheels View Post
    What?
    Yeah, I'm up to 3 questions now.
    Last edited by no motor?; 03-20-10 at 09:06 AM.

  12. #12
    Seņior Member ItsJustMe's Avatar
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    I think he's talking about the MagicShine 1400. I also think it's overkill for road riding; the 900 (or 500, or whatever it actually is, the original) is more than enough light as far as I'm concerned.

    I assume the 1400 is aimed at off-road riding where this much light has a use.
    Work: the 8 hours that separates bike rides.

  13. #13
    Senior Member rumrunn6's Avatar
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    hahahaha LOL ... what itsjustme said ... I was not firing on all cylinders yesterday morning. BTW was glad to have my "single" magicshine last night on a pitch black rail trail.
    Last edited by rumrunn6; 03-21-10 at 08:45 AM.
    cycling is like baseball ~ it doesn't take much to make it interesting

  14. #14
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    Quote Originally Posted by cccorlew View Post
    Sigma vs MagicShine. I gave up and bought a wired computer for my commuter. I've got a big ride coming up and I'm hoping that putting the battery in teh seat bag will be enough to let the sigma work. Confidence is low. Testing begins this weekend.
    I have solved almost all interference issues with Sigma vs. Magicshine. The light and the battery wires need about 5 inches of separation from the computer. The battery can be mounted on the top tube or in the seat pack. Throughout the winter I rigged my road bike with two lights mounted just inside the shift levers, a third Magicshine flashlight on the helmet, and a Sigma ROX 9.0 mounted on a carbon stem. The four cell batteries were mounted in the seat pack and on the top tube. One of the Magicshine lights, the older 3 mode version, never interfered with computer sensing. The other light, a 5 mode version, would only interfere with Sigma cadence sensing after about 4 hours of run time in low or strobe. This would occur even with the seat pack mounted battery. As the 5 mode light runs down the regulator boosts current to maintain wattage/lumens. This increased current causes the interference problem, but for some reason the 3 mode Magicshine does not interrupt the Sigma computer at all, even with a weak top tube mounted battery emitting higher current.

    Using the five inch rule and fresh Sigma batteries you should be able to limit interference to a cadence sensing interruption as the 5 mode light switch begins to glow red-orange.

  15. #15
    Tires- 2 skinny, one fat runnercyclist's Avatar
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    Quote Originally Posted by sierrabob View Post
    I have about 20 hours of heavy rain exposure to my Magicshine batteries. With just a bit of liquid electrical tape on the wires and cells, I have not had one problem with water incursion. One battery was kept in a seat pouch, but I just wrapped the other around the top tube.

    The only problem worth noting is that the 5 mode Magicshine light interferes with my Sigma bike computer cadence as the voltage wanes and the regulator boosts current to maintain wattage. The older 3 mode light does not cause this problem.
    Really? And it's mounted on your handlebars? Did you extend the cable?
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  16. #16
    gone ride'n cyclinfool's Avatar
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    Quote Originally Posted by no motor? View Post
    is the Magicshine battery affected by the cold like that too?
    I've ridden it down to 25F for an hour w/o problem - done it for three days without a charge in between.
    Absolutely the best bike light out there IMHO - I am sure glad this forum turned me on to it last year, let me ride into mid December and start back up this month now that the ice is off the roads.
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  17. #17
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    Quote Originally Posted by runnercyclist View Post
    Really? And it's mounted on your handlebars? Did you extend the cable?
    With a few zip ties, the Geomangear extension cable allows a neat connection from seat pouch to handlebar.

  18. #18
    Seņior Member ItsJustMe's Avatar
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    My testing indicated that the 3:15 runtime went down to about 2:30 at 5*F. I tried it in my freezer. I let the battery sit in the freezer for about 30 minutes before starting, to let it get cold. You'd get a little better results if you brought it out from a warm house and started your ride right away. If it were really cold, I'd get an extension cable and put it in a jacket pocket.
    Work: the 8 hours that separates bike rides.

  19. #19
    gone ride'n cyclinfool's Avatar
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    Quote Originally Posted by ItsJustMe View Post
    My testing indicated that the 3:15 runtime went down to about 2:30 at 5*F. I tried it in my freezer. I let the battery sit in the freezer for about 30 minutes before starting, to let it get cold. You'd get a little better results if you brought it out from a warm house and started your ride right away. If it were really cold, I'd get an extension cable and put it in a jacket pocket.
    5F - you da man!
    The battery pack will warm up internally as it draws power, but a significant reduction in life is to be expected. I keep mine in the garage so it does get cold but probably remains above freezing.
    "Of all the things I ever lost I miss my mind the most." Mark Twain
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