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Author Topic: laptop charger  (Read 1580 times)
billi
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« on: January 07, 2018, 12:38:04 PM »

Hi

Am looking for a   external battey capacity for my laptop , any ideas ?

Can i just connect 3x  6 Volt recharchable batteries  in series to  18 volt   and   and connect to my laptop ?

Or   a  200 watt inverter  conected to a battery and  charge through  the 230 AC  Laptop adapter
I know that there are losses , but have 100 watt PV panel    and a chargecontroler spare , only need inverter and a batt

Any thoughts ?

Thanks Billi
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rogeriko
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« Reply #1 on: January 07, 2018, 12:41:27 PM »

I have used 3 six volt batteries before without any problems. The laptop has internal circuitry to control battery charging and power supply voltages for the different components.
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billi
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« Reply #2 on: January 07, 2018, 12:54:05 PM »

Ok thanks Roger
I would asume  that i can connect a 12 volt PV direct to a 18 volt Battery without overcharging ...

If i go with an inverter idea  and use my car starter battery  as the storage ..... is there a starter battery recomendation , that  can take   discharge cycles  ?

« Last Edit: January 07, 2018, 01:06:47 PM by billi » Logged

1.6 kw and 2.4 kw   PV array  , Outback MX 60 and FM80 charge controller  ,24 volt 1600 AH Battery ,6 Kw Victron inverter charger, 1.1 kw high head hydro turbine as a back up generator , 5 kw woodburner, 36 solar tubes with 360 l water tank, 1.6 kw  windturbine
Fionn
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« Reply #3 on: January 07, 2018, 01:31:37 PM »

There are cheap charge pump adapters available to run your laptop from a 12V supply, they work really well and are super efficient.
I've got a few regular ones that are adjustable output voltage and one for my Macbook also, they work great and cost very little.
I don't think it's worth risking the direct connection method and you can use one of these with any vehicle or other 12V power source.


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camillitech
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« Reply #4 on: January 07, 2018, 04:49:39 PM »

There are cheap charge pump adapters available to run your laptop from a 12V supply, they work really well and are super efficient.
I've got a few regular ones that are adjustable output voltage and one for my Macbook also, they work great and cost very little.
I don't think it's worth risking the direct connection method and you can use one of these with any vehicle or other 12V power source.




Yup, I'd go with that Fionn, got one of those myself and it will run just about any laptop I've had. The only exception being a Fujitsu Siemens that was around 20V with the screen the size of a TV. It would even run that for a little while before it overheated, was fine once it cooled down again. Still have it now and it must be 6 or 7 years old.
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Scruff
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« Reply #5 on: January 08, 2018, 01:22:17 AM »

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