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laptop power (Read 1395 times)
Dunny
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france
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laptop power
28.06.2017 at 20:47:45
 
hello all,

I have another question. I've just put in two knew batteries and now want to charge my laptop. Can I do this using a USB connection or do I need to use an inverter, not that I actually know what this does! The 12 v system is in good order and is all fused correctly.

Any help would be really appreciated

Thanks

Dunny
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« Last Edit: 28.06.2017 at 20:51:35 by Dunny »  
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ice
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Re: laptop power
Reply #1 - 24.08.2017 at 22:41:35
 
Hi Dunny,
Assuming you are referring to a traditional laptop that has the external power pack then you will need to use an inverter. But be cautious, inverters are inefficient in turning 12vdc into 240vac and will whack your batteries in little time.
For example....
a 150watt inverter at 240vac is just under half an amp, however 150watt at 12vdc is 12.5 amps.
Again I'm assuming that your two new batteries are 110ah each and as one would not drain the batteries below 50% (as regularly discharging batteries below this will reduce their lifespan) you have 110ah at your disposal so 110/12.5=8.8 or 8hrs48minutes if you are drawing anything else or not replacing the lost charge (running the engine, solar/wind)

If the laptop is used through habit, consider getting a tablet/iPad as these will only draw an amp or two at most.

Hope this helps Smiley
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John Woodhouse
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Re: laptop power
Reply #2 - 27.08.2017 at 09:30:00
 
My notepad runs off 19v dc.
I have a  DC regulated adaptor. Input 12v dc, output variable from 15-24v dc. Works a treat.
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