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Thread: Magicshine Cree XM-L: possible to power from 36V ebike battery?

  1. #1

    Default Magicshine Cree XM-L: possible to power from 36V ebike battery?

    Hi, is this possible to do using this: https://www.banggood.com/200W-10A-DC...r_warehouse=CN or am I getting it wrong as usual? Also could another one of these work for 6V dynamo type lights? I know you can buy ebike specific lights and I have a front Spanninga Axendo and rear Spanninga Elips of this type, both rated 6-36V, but I would like to hook up the Magichshine (I think it is an MJ808E) as well as a "high beam" for unlit roads, with a switch in line to cut it when a vehicle is coming towards me. Also I have a spare set of 6V LED dynamo lights which I would like to use on my wife's about town ebike, also 36V.

    EDIT: or this: https://www.ebay.co.uk/itm/LED-LM259...MAAOSwICpZ6kPq
    2A is enough for the dynamo lights, not sure for the Magicshine
    Last edited by niggle; 11-20-2019 at 05:47 AM.

  2. #2

    Default Re: Magicshine Cree XM-L: possible to power from 36V ebike battery?

    i do not see why not.

  3. #3

    Default Re: Magicshine Cree XM-L: possible to power from 36V ebike battery?

    Quote Originally Posted by alpg88 View Post
    i do not see why not.

    Great, Magicshine 4 x 18650 battery pack gives 8.4V at full charge, would the lamp be using under or over 2A at that voltage?
    Last edited by niggle; 11-21-2019 at 03:53 PM.

  4. #4

    Default Re: Magicshine Cree XM-L: possible to power from 36V ebike battery?

    Quote Originally Posted by niggle View Post
    Great, Magicshine 4 x 18650 battery pack gives 8.4V at full charge, would the lamp be using under or over 2A at that voltage?
    it shouldn't be over
    https://forums.mtbr.com/lights-night...ew-708128.html

    Magicshine MJ-808 Updated Version SSC P7
    high 1,58A 7,15V 11,29W
    low 0,47A 7,37V 3,46W

    Magicshine MJ-808E Cree XM-L
    high 1,49A 7,17V 10,68W
    low 0,45A 7,39V 3,32W

    Eastward YJ-E02 SSC P7
    high 2,37A 3,78V 8,95W
    low 1,12A 3,97V 4,44W

    it is an old thread, but numbers should not change much
    Last edited by alpg88; 11-21-2019 at 08:51 PM.

  5. #5
    Flashaholic* znomit's Avatar
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    Default Re: Magicshine Cree XM-L: possible to power from 36V ebike battery?

    Those LEDs are around 10W but usually underdriven ~ 6W so you'll have no problems with that converter. If you can find something with 3 or 4 amps you'll be good in case you want to upgrade to a dual XML light though.

  6. #6

    Default Re: Magicshine Cree XM-L: possible to power from 36V ebike battery?

    Wired this up the other day and the Magicshine works fine with it. The display does not work but that is no big deal, I just adjusted it to the same output as a fully charged battery with my multimeter. I have a motorcycle type on/off switch on order which will make it a lot quicker to switch it off, but the motorcycle switch will need to be switched back on straight after switching off, so the lamp is ready to be switched back on with it's own switch and it is a shame that the Magicshine switch is so awkward operate, especially with gloved hands.

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