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usb charger

Discussion in 'Car Repairs / Maintenance' started by elmsoft, 25 May 2015.

  1. elmsoft

    elmsoft

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    This is actually a motor bike question but perhaps someone can help anyway. :)

    I fitted a usb charger to my bike. It came with a long cable- two strands, a black and a red with an inline fuse fitted to the red. Each had a large ring terminal connection "clearly" intended to fit directly to the battery.

    But it appears to drain the battery if the bike is left standing for a few days.
    I obviously expected that when not in use the charger would not use current.
    How likely is it that such a unit would have a small, constant drain?
     
  2. Burnerman

    Burnerman

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    Unfortunately the device will draw a small amount of current, and as there isn't much to play with anyway, a flat battery will result.
    Does the thing get warm at all?
    John :)
     
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  4. elmsoft

    elmsoft

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    Thanks for your info

    Doesn't appear to. But then it's plastic and as you point out, a few milli-amps is enough to do the damage Long before the molten plastic stage. lol
    I could of course wire it through an ignition switched relay but, as I said, it certainly doesn't look like that was the intention, and being lazy.....



    Live and learn.

    :)
     
  5. mattylad

    mattylad

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    Put a switch inline.

    Or power it from the ignition switch.
    Or, a relay that is powered off the ignition switch so that when you turn the bike on, the USB also becomes powered.
     
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  7. elmsoft

    elmsoft

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    Thank you both.
    I"ll take a feed off a relay.
    Did think for a moment about an inline switch, and then a little neon to show whether it was on, and then a warning buzzer ...
    And now I'll just do it properly!

    :)
     
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