Power laptop

Discussion in 'Tech/Mech General' started by patilo, Jan 2, 2012.

  1. patilo

    patilo Read Only Funster

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    Have driven myself silly in trying to work out the best way of using the laptop in the van so have to ask for help. Not easy for an independant woman.

    So...What's the best way of using the laptop in my motorhome when not on mains electric?
    Will be replacing the old battery with a 110 leisure battery in the spring- Unfortunately, no room to put another.
    Have a 12v power socket in the van to connect too.

    1). Run it off the leisure battery with ...Converter?
    2) Anything better?

    Probably such a simple thing for other folk.:RollEyes:
     
  2. Heyupluv

    Heyupluv Read Only Funster

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    I use one similar to this one ..used it now for 4 year no trouble .... they are simple.....plug into your 12v habitation 12v socket ...this will either charge up your laptop battery while you are using it, or charge the laptop up when not in use or run the laptop without its battery fitted.. make sure you have it set to the correct voltage for your laptop and the correct plug for your laptop

    http://www.ebay.co.uk/itm/Car-Unive...PowerSupplies&hash=item3f0fb53709#ht_3346wt_9

    these state what laptop they are for

    http://www.ebay.co.uk/itm/Car-Charg...erSupplies&hash=item4cf5047cc3#ht_2083wt_1185

    http://www.ebay.co.uk/itm/Car-Charg...erSupplies&hash=item4cf5047cc3#ht_2083wt_1185

    look on ebay for the best price and feedback...

    You are better taking a 12v fused socket off your hab battery so you are not running your cab battery down...
    Mel:thumb:
     
    Last edited: Jan 2, 2012
  3. patilo

    patilo Read Only Funster

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    Step up transformer-- another new thing....
    Step up transformers on ebay all seem to be converting from USA to UK.
    Is this what you mean?
     
  4. spannermanwigan

    spannermanwigan Read Only Funster

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    Go to nearest maplins branch excellent selection of
    multi voltage power adaptors available for less than £50. Thats were I bought the one we use and its been terrific can also charge other equipment such as phones and i pod etc.
    will connect to 12v cigarette lighter socket, so can be used both from leisure battery or
    vehicle when driving.

    http://www.maplin.co.uk/batteries-and-power/laptop-power-supplies/laptop-power-supplies

    hope this helps
    regards
    Steve
     
  5. patilo

    patilo Read Only Funster

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    Also, looked at the car charger adapter. This seems Ok. Is this the best way or tapping into the leisure battery?
     
  6. patilo

    patilo Read Only Funster

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    Hi Steve
    Maplins in Wigan -Robin Park...Know something about electrics? :) not found them very helpful in the past.. but maybe this is a simple solution.
    Will explore Maplins online.
    By the way, You're only down the road from me in Leigh.
    Many thanks
     
  7. Wildman

    Wildman Read Only Funster

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    the link that Mel gave you is for a dc/dc charger (just check it has the correct plug for your laptop).
    A stepup transformer converts A/C from one voltage to another i.e. 110V - 240V.
    The other option is to use a small 150W inverter that changes 12v DC into 240V A/c so that you can use your normal charging lead. I actually prefer this option as I can then have the option to plug in other phone chargers etc or run small 240V items (but not a hairdrier before you ask)
    As you only have a single leisure battery I would charge the laptop whilst driving then use it off of its own battery when stopped. I find I get a 4-6 hours from a small netbook battery as opposed to an hour or two from a bigger laptop.
     
  8. Heyupluv

    Heyupluv Read Only Funster

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    I thought any voltage that was increased from sorce was classed as step up ...eg... 12 v to 19v dc

    also I did state to make sure it was the correct plug and voltage on my reply,
    also I would think that the 12v unit I sent a link for would use less power than a 150 inverter you have suggested and cheaper to buy...as the lady was only asking what to use for her laptop.....not for the all the other 12V Accessories in the motorhome
     
    Last edited: Jan 2, 2012
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  9. patilo

    patilo Read Only Funster

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    Thanks wildman.
    The inverter route plugged into the car whilst running is probably the option that has come up the most. Will do further exploration on that one as well.
    From what you say, it seems like the inverter will use up too much power if plugged into the leisure battery. Am i right on that one?
     
  10. slobadoberbob

    slobadoberbob Read Only Funster

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    The issue with an investor is

    Roger, while I fully agree with you, the only point I would add is that really you need 'pure sin wave' power and not modified as in the bog standard investors you can buy at Maplin. I have some of there units, but if I want to run the TV (without flicker lines) or a high end computer then I always run the laptop off my Sterling inverter that is pure wave... worth noting, as computers do not like modified power..same with a washing machine.. the electronics play up.

    Bob
     
  11. philw111

    philw111 Funster

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    Damn, I'm going to have to stop doing the washing while driving:Rofl1:
     
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  12. Heyupluv

    Heyupluv Read Only Funster

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    I agree with you Bob and the cost of pure sine wave cost in the hundreds...the lady on asked to run her lap top:Doh:...unless Roger is paying for it:Eeek:
    try and keep it simple for the lady..... not overload her
    Mel
     
  13. Wildman

    Wildman Read Only Funster

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    a 150W inverter has a very small overhead but the average laptop will use around 4amps per hour. Your leisure battery is rated in amp/hours so an 85 amp/hour battery theoretically gives 1 amp for 85 hours, however in practice this is incorrect as a battery should never be taken below 50% charge giving you a usable 42.5 amp hours to cover your lights, water pump (inc WC flush if electric) TV and lappy. You can see it is not a lot to go around. You can help by changing lights to LED bulbs and not having them all on all the time, switch things off when not in use and generally being aware of your consumption versus available battery. As to Bobs comment re pure sine wave, in some cases it is valid but not all, the bigger problem is too low a battery voltage to drive it properly. My 150W is a cheapo off ebay costs around £12 and runs my TV and Sat box plus DVD player plus any chargers I need but of course not all at the same time. The batteries that I use to run the inverter are charged solely from Solar power. and not the engine.
    This 350W inverter is one that I use in the summer, the 150w one I have overheats without a fan.
    http://www.ebay.co.uk/itm/350W-DC-1...082?pt=LH_DefaultDomain_3&hash=item1c17c92f3a
     
    Last edited: Jan 2, 2012
  14. GJH

    GJH Funster Life Member

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    I bought one of the multi adapters from eBay a few years ago and used it with several Acer laptops/netbooks. Last year I bought an Asus netbook with a different fitting, for which I didn't have an adapter, so bought a specific 12v charger direct from Asus.
     
  15. Heyupluv

    Heyupluv Read Only Funster

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    Crikey..Rodger....the person only asked for something to run the laptop.....not a new motorhome:Doh::Doh:
     
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  16. patilo

    patilo Read Only Funster

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    Thanks Mel
    YEs, keep it simple - Found that the expense of pure sine wave inverters doesn't justify their use for a laptop. But, take on board that there may be problems with hungry electric equipment.
     
  17. slobadoberbob

    slobadoberbob Read Only Funster

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    I was waiting for it

    I thought as I wrote it.. how long before someone says something about a washing machine.... ok Yes some RV's do have a washer dryer fitted. Rick (Motoromin ... in the other place as they say in the commons... or on RVOC has one in his RV....)

    But no we do not in our 25' RV, but then we do have the big fridge and freezer.... but electronics can be an issue on some laptops. The inverter is fine if it is a sin wave, but they cost more... or get a purpose made unit for the laptop to charge and run from a 12v socket.

    Bob:BigGrin:
     
  18. patilo

    patilo Read Only Funster

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    So...solution....inverter(150w)
    Many thanks for all invloved.
    Can now take mum out as the sun is shining,the first time in three days.
    Despedida
     
  19. Douglas

    Douglas Read Only Funster

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    Maybe you have been unlucky or I have been lucky, but I have been useing a selection of "bog standard" inverter not the pure sine wave kind for years runing computers microwave ovens, power tools and TV's and never had a problem of any kind.

    Doug...
     
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  20. stcyr

    stcyr Funster

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    Hi. Before you decide have a look at ebay item 3903 2053 9573. Specific ones available for your laptop. £14.80. Looks same as your mains charger but just plugs into cigarlighter socket.

    I used a cheapie inverter for years in a truck to power an old Toshiba laptop with no problems but my newer HP did NOT like it. I tried a Maplins charger with the multiple sockets - wouldn't work on the HP but did work with a spare Samsung...

    Been using the above ebay item for 6 months in the MH and in the car, no probs at all.

    :thumb:
     
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