honitonhobbit Posted October 30, 2007 Share Posted October 30, 2007 I am a little confused - but enough of that! Okay, lap top needs in excess of 70 watts to operate. I have a 12volt power scourse that will supply upto 2000mA. Will that work? Yes I know I could scour the net for a simple chart, but I have limited access tot he net, I have to work, yaddah, yaddah. Asking politely for advice is quicker. Thanks guys Quote Link to comment Share on other sites More sharing options...
Mark90 Posted October 30, 2007 Share Posted October 30, 2007 I know this thread wasn't aimed at me But if that's supplying 2000mA at 12V then nope, it only supplies 24W. Now for the science bit..... 2000mA is 2A amps x volts = watts 2 x 12 = 24 24 < 70 Quote Link to comment Share on other sites More sharing options...
Exmoor Beast Posted October 30, 2007 Share Posted October 30, 2007 Deleted coz Mark90 made a better job of it than I did Will Quote Link to comment Share on other sites More sharing options...
honitonhobbit Posted October 30, 2007 Author Share Posted October 30, 2007 Thank you muchly all explained bootifully Where might one find a 70watt> 12 volt charger? Quote Link to comment Share on other sites More sharing options...
ltwt1981 Posted October 30, 2007 Share Posted October 30, 2007 Are you sure its 12 volt, mine works on 12 Volt but is 16 volt I think. I use a Maplins unit 12 volt in 16 volt out, cost £20 IIRC. Quote Link to comment Share on other sites More sharing options...
honitonhobbit Posted October 30, 2007 Author Share Posted October 30, 2007 WHat I am after is a 12volt scource that will provide 70 watts. The lap top sorts out the voltage... What wattage does your Maplin charger give? Quote Link to comment Share on other sites More sharing options...
Mark Posted October 30, 2007 Share Posted October 30, 2007 So you need a 12V Adapter capable of dishing out just under 6A? Thats going to be a struggle... Why not try a cheap inverter and plug your mains power supply into it? Alternatly try getting the dedicated car supply for the laptop - I found one on eBlag for my Dell... Just a thought.. Mark Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted October 30, 2007 Share Posted October 30, 2007 Is this in-car? If it is, just wire 12V direct into the laptop. If not, and you need a 70W mains-to-12v converter, I might know a man... Then again, Maplins have quite a few of each flavour. Quote Link to comment Share on other sites More sharing options...
honitonhobbit Posted October 30, 2007 Author Share Posted October 30, 2007 So you need a 12V Adapter capable of dishing out just under 6A? Thats going to be a struggle...Why not try a cheap inverter and plug your mains power supply into it? Alternatly try getting the dedicated car supply for the laptop - I found one on eBlag for my Dell... Just a thought.. Mark Already got a cheap inverter but I was looking to simplify things a tadge. I shall also try option two... Fridge - keep talking me old mucker Quote Link to comment Share on other sites More sharing options...
pugwash Posted October 30, 2007 Share Posted October 30, 2007 no problems http://linitx.com/viewproduct.php?prodid=10754 Quote Link to comment Share on other sites More sharing options...
honitonhobbit Posted October 30, 2007 Author Share Posted October 30, 2007 Thanks Jim, was looking for something cheaper though. Fridges suggestion of a direct wire makes sense Quote Link to comment Share on other sites More sharing options...
FridgeFreezer Posted October 30, 2007 Share Posted October 30, 2007 Fridge - keep talking me old mucker So do you need 12v into the laptop in a car-type environment? If so, it may be able to put up with in-car direct voltages (~12v-15v), plug in the laptop adapter and measure the voltage on the end with no laptop, it may well drift up to 15v with no load, in which case I'd say go for it and just wire direct from a cig lighter plug to a laptop plug and cut out all the faffing about in the middle. Toughbooks will run on anything from ~9v upwards even though their specs say they need 18. Quote Link to comment Share on other sites More sharing options...
Mark90 Posted October 30, 2007 Share Posted October 30, 2007 If running under voltage you usually just find that battery doesn't charge. When using my old Tosh's in the car I just wire them direct. I think battery is 10V and main power supply puts out 15 or 18V, I can't quite remember, anyway it's happy enough on car voltages. Quote Link to comment Share on other sites More sharing options...
landmannnn Posted October 30, 2007 Share Posted October 30, 2007 Alternatively, Maplins again, 12v 120W power supply £30, £20 for less power.. laptop power - maplins Quote Link to comment Share on other sites More sharing options...
ThreeSheds Posted October 30, 2007 Share Posted October 30, 2007 My Vaio mains charger puts out 16v so I thought that it would work on 12 - but I was wrong. Not a thing... It won't even light the power light... I'm off to Maplins... Quote Link to comment Share on other sites More sharing options...
BoatBuoy Posted October 30, 2007 Share Posted October 30, 2007 Switched Mode These guys do some funky power supplies. If it was my laptop, I would like something between it and a vehicle battery. For the sake of a few sheckles, its better than cooking a laptop. We use them regularly at work to at as regulated power cut proof supplies to survey equipment. Quote Link to comment Share on other sites More sharing options...
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