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  1. #1
    John Nichols's Avatar
    John Nichols Guest

    Default Celestron Power Tank As Laptop Power Source



    Looking down the road to when I purchase a goto SCT, I recently purchased a
    Celestron Power Tank. Obviously I plan to use it instead of relying on
    batteries, but I'd also like to use it as a power source for more laptop
    when I'm trying to do astrophotography (my laptop's battery only lasts 1.5
    hours), but without some sort of adapter (cigaretter?) I don't see a way of
    doing so. Surely I'm not the only person out there who would like to, or
    actually does, do this?

    Any recommendations?



  2. #2
    Terry A Haimann's Avatar
    Terry A Haimann Guest

    Default Celestron Power Tank As Laptop Power Source

    On Fri, 20 Jul 2007 14:48:18 +0000, John Nichols wrote:


    The power Tank (sic) doesn't have the horse power to run a goto and a
    laptop. You should consider a Marine Battery.


  3. #3
    Chris L Peterson's Avatar
    Chris L Peterson Guest

    Default Celestron Power Tank As Laptop Power Source

    On Fri, 20 Jul 2007 14:48:18 GMT, "John Nichols"
    <bejay@worldnet.att.net> wrote:


    I hope you got the bigger model... 7Ah is marginal even for running your
    scope, let alone a scope and laptop. Remember, these things don't like
    to be deep cycled.

    Some laptop manufacturers provide 12V power supplies for their products.
    Check for that first. Otherwise, the standard approach (in spite of some
    inefficiency) is simply to use a power inverter, with a 12V lighter
    adapter on the input and 120VAC output. You then plug your regular
    laptop power supply into that. Suitable inverters run around US$50.

    _________________________________________________

    Chris L Peterson
    Cloudbait Observatory
    http://www.cloudbait.com

  4. #4
    Joe S.'s Avatar
    Joe S. Guest

    Default Celestron Power Tank As Laptop Power Source


    "John Nichols" <bejay@worldnet.att.net> wrote in message
    news:SW3oi.178136$Sa4.43964@bgtnsc05-news.ops.worldnet.att.net...

    Several other replies have told you that the Power Tank does not have the
    capacity to run both the scope and a laptop.
    Let me address the power adapter question. My laptop is an HP. HP sells a
    power adapter, power supply, battery eliminator, or whatever you want to
    call it, that operates off either house current (110VAC) or 12 volts DC. It
    comes with two power cords -- well, three power cords, actually. One power
    cord is permanently affixed to the power adapter and that cord goes to the
    laptop. The other two cords have plugs that plug into the end of the power
    adapter and these are the input cords -- one of them plugs into the wall for
    using house current, the other has a cigarette lighter plug for plugging
    into the cigarette lighter or 12 VDC outlet of a car (truck, whatever).

    I have seen after-market power adapters that work the same way if you don't
    want to spend the $$$ for an OEM power adapter. While mine is an HP, I
    suspect every other laptop maker has the same thing. This is what the HP
    device looks like:
    http://www.shopping.hp.com/product/n...PC628A%2523ABA
    (the photo shows only one power cord but the description tells you that it
    comes with both AC and car power cords.)



  5. #5
    William Hamblen's Avatar
    William Hamblen Guest

    Default Celestron Power Tank As Laptop Power Source

    On Fri, 20 Jul 2007 14:48:18 GMT, "John Nichols"
    <bejay@worldnet.att.net> wrote:


    You can get for most laptops adapters that plug into a 12 V cigarette
    lighter socket. I've got one for a ThinkPad.

    You can get cheaper versions of the Celestron Power Tank at auto parts
    stores where they are sold as jump starters. They don't have
    flashlights or radios built in, but they do supply power for about
    two-thirds of the price. If you need more power you can roll your own
    from a wheelchair battery.

    Bud
    --
    The night is just the shadow of the Earth.

  6. #6
    RMOLLISE's Avatar
    RMOLLISE Guest

    Default Celestron Power Tank As Laptop Power Source

    On Jul 20, 9:48 am, "John Nichols" <be...@worldnet.att.net> wrote:

    Hi:

    As you've been told, the Powertank doesn't have the oomph you need to
    run a laptop for long. My solution? What I've used for several years
    is a 75ah trolling motor battery (aka "deep cycle marine battery") and
    an inverter (a Black and Decker). The battery is a little on the heavy
    side, but it does have the power I need, and is priced about the same
    as a jump start pack like the Powertank.

    Be further advised that the Powertank has had quality problems. If you
    want a battery like that, check Wal-Mart's automotive section instead.

    Unk Rod


  7. #7
    John Nichols's Avatar
    John Nichols Guest

    Default Celestron Power Tank As Laptop Power Source


    "John Nichols" <bejay@worldnet.att.net> wrote in message
    news:SW3oi.178136$Sa4.43964@bgtnsc05-news.ops.worldnet.att.net...

    Thanks, all, for the advice. Looks like it's back to the drawing board on
    this one.

    Where are you, Dave?



  8. #8
    jeffbullard's Avatar
    jeffbullard Guest

    Default Celestron Power Tank As Laptop Power Source


    RMOLLISE;809500 Wrote:

    I used a small 7Ah lead-acid rechargeable for my scope and laptop. To
    many of my all-night astrophotography sessions were cut short
    especially with dew-zapper added. (Many nights I wished for
    dew-zapper for the laptop)

    In retrospect I should have gone for a marine battery, which you ca
    get at your local outdoors store such as Academy or whatever. I looke
    at them recently and they go for about $60 plus another $50 for a decen
    charger. Then add a power inverter and you can use your regular lapto
    AC power chord


    --
    jeffbullard

  9. #9
    thad@thadlabs.com's Avatar
    thad@thadlabs.com Guest

    Default Celestron Power Tank As Laptop Power Source

    On Jul 20, 7:31 pm, jeffbullard <jeffbullard.e73...@spacebanter.com>
    wrote:

    "Chord"?

    Would that be A-flat or a G-string?

    :-)


  10. #10
    G's Avatar
    G Guest

    Default Celestron Power Tank As Laptop Power Source

    Buy a new Toyota truck. They can come with a AC outlet in the truck bed.
    Problem solved, nice truck to
    I now this cause I have one, 750amp deep cycle battery in the truck...
    last all night and it starts up fine. Then the drive home recharges the
    battery...


    "John Nichols" <bejay@worldnet.att.net> wrote in message
    news:SW3oi.178136$Sa4.43964@bgtnsc05-news.ops.worldnet.att.net...



 

 
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