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  1. #1
    Join Date
    Mar 2013
    Anchorage, Alaska

    Default Portable 12 Volt Power Supply

    Sometimes I need a 12V DC power supply. When no fully charged car battery is laying around, I would have to charge one up.
    I just searched and found some. One thing, I would not want to spend too much on one. What portable power unit would one recommend?

  2. #2
    Join Date
    Oct 2003
    Michigan, USA


    I keep a UPS replacement battery on hand for sundry portable 12V needs. (e.g., Handy to keep all the vehicle electronic modules powered up when swapping car batteries). There are a range of capacities available, depending on what your power requirements are. You can fashion leads with the correct connectors for the batteries terminals and with alligator clips, or any other termination you need, on the other ends. They are designed for deep discharge, hold a charge for a long while and are rechargeable with an automotive battery charger.
    Last edited by Pennhaven; 12-15-2019 at 10:22 AM.
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  3. #3


    Here is a recent test of jump packs.
    Objects in closer are mirror than they appear.

  4. #4
    Join Date
    Nov 2019
    Florida, U.S.

    Default Cen-Tech power pack

    i bought a Cen-Tech portable power pack (the 4 in 1) from Harbor Freight. it was around $70USD and i used a coupon on it to lower it down to around upper $50's.

    compared to the ones featured in the YouTube video attached in this thread, for around those similar prices this one seemed to offer more.

    here's the link on harbor freight:

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