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Author Topic: External Laptop Power Question  (Read 1308 times)

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Offline Morphius

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External Laptop Power Question
« on: July 17, 2005, 08:02:44 PM »
Ok, I'm still pretty new to the taping game, and while I have a bit of wiring experience, I'm no electrical engineer  ;)

The laptop I want to power says it takes in 19.5V DC at 2.5A.  How do you guys suggest I make/buy an exteral battery box?

I could make my own battery box to meet these requirements, but I'm worried about two things:

1. Where could I find an adaptor plug for a Dell, other than buying an AC adapter and cutting the end off?
2. When the external battery voltage starts to drop, will the laptop automatically switch over to the internal battey? or will it burn up trying to run off the lower voltage?

I also have an old 12V DC battery that powered a spotlight.  Could I buy a cheap little power inverter and then run the stock power cord off of that? or will the modified sine curve from the inverter cause problems?

Sorry if anything here sounds dumb, but I'm afraid of screwing up my notebook, and I already did a search on the boards but couldn't really find anything.

Offline aberg

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Re: External Laptop Power Question
« Reply #1 on: August 12, 2005, 07:27:33 PM »
I am pretty much wondering the same thing...

I think you could run the stock AC adapter through an inverter connected to your 12v battery. That's my plan.

There must be a better solution out there that doesn't cost $300+ like a valence n-charge.

Offline leegeddy

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Re: External Laptop Power Question
« Reply #2 on: August 13, 2005, 04:42:36 PM »
http://taperssection.com/index.php?topic=44505.0

i still have my Batterygeek power supply for sale.

marc
"I'm a taper, he's a taper. Wouldn't you like to be a taper too?"
"Mics? What mics? This is my hat."

Offline deeputahpowder

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Re: External Laptop Power Question
« Reply #3 on: August 14, 2005, 01:35:43 AM »
I plan on trying something like this:
http://www.kensington.com/html/2089.html
or this
http://www.lindelectronics.com/cgi-bin/store/shop.cgi/!ORDERID!/aaa/AP2425-523G3/dbx_gen_detail_product
 I'll use the lighter attachment to connect to this to my 12v battery.
http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&product%5Fid=270-1527
in fact a buddy gifted me 2 of these hawker sbs j40's
http://www.gotbatteries.com/products/slabatteries/PowerSafeSBS.asp
I'm on a mission to make this work for a festival rig with the batteries connected in parrallel that i can wheel in on a handcart / wagon or in a cooler.  I've TRIED the AC inverter route without success.  I'm running sound pro at 853's ->battery box->mobilepre->ibook and with my ibook->100w inverter(also tried 400w inverter)-> battery and my mics connected to the battery box -> mobilepre -> ibook  i'm getting a horrible sound rumbling through - ground loop? i don't know but it is BAD. i'm going to do the phantom mod for my mics and maybe eliminating the battery box will make the inverter a usable solution - but as it stands now the inverter will not work. in the short term using the kensington dc adapter is my project for the next day or two.
Avantone ck-1's ->  722

 

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