inverter or 12v supply for laptop

Submitted: Thursday, Apr 03, 2003 at 21:27
ThreadID: 4212 Views:3855 Replies:5 FollowUps:3
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a quick question is it better to use an inverter for a laptop power supply or is there an easy 12 v supply /adaptor available from battery for a toshiba satellite laptop89 nissan looking foward to august and more travelling
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Reply By: Phil P - Thursday, Apr 03, 2003 at 22:02

Thursday, Apr 03, 2003 at 22:02

My preference was to use an inverter, that way I could use the inverter to charge up other devices (Digital Camera etc).

Phil P
AnswerID: 16828

Reply By: joc45 - Thursday, Apr 03, 2003 at 22:19

Thursday, Apr 03, 2003 at 22:19
I use a converter - more efficient than stepping up to 240, then back. Some laptops run directly from the mains; ie, have no external power supply - in this case, you have no choice but to use a 240v inverter. Otherwise,
Jaycar have one which looks like it will fit the bill, including most adaptors (copied from website, apparently putting the very long url in here causes problems):

RRP: $89.50

Laptop Computer Universal Switchmode DC-DC Multi-Voltage Car Power Supply
Run your laptop computer from your car battery. This switchmode regulated 13.8VDC input DC- DC converter power supply will increase the voltage to run a laptop computer from a car. - Input voltage 12 - 15VDC car battery power- Output voltage features 7 different voltages to suit most laptops 15V, 16V, 18V, 19V and 20VDC @ 3.5A regulated and 22V, 24VDC @ 2.9A regulated- Supplied with 5 changeable output plugs: 2.1 x 5.5mm, 2.5 x 5.5mm, 3.0 x 6.3mm, 1.4 x 6.0mm, 1.7 x 4.75mm- Stabilized output, low ripple and low interference- Short circuit and overload protected- High efficiency and low energy consumption- Power LED monitorWARNING: Be extremely careful, and triple check that you have the output plug connected with the correct polarity to suit your laptop. Connecting with the polarity the wrong way will damage a laptop computer, If unsure seek professional guidance."

AnswerID: 16830

Follow Up By: Allyn (Pilbara) - Friday, Apr 04, 2003 at 12:36

Friday, Apr 04, 2003 at 12:36
I and several mates have the Jaycar converter and for $90 it's a much better option. Works fine.Do or Do Not - there is no try !
FollowupID: 10459

Reply By: KiwiAngler - Thursday, Apr 03, 2003 at 22:48

Thursday, Apr 03, 2003 at 22:48

I drive a Toyota Landcruiser 100 series (just thought I would get the Toyo/Nissan 'thing' going again) and also have a Toshiba Satellite 3000.

I use this is EXCELLEN T!

AnswerID: 16835

Follow Up By: Member - dolfn - Friday, Apr 04, 2003 at 07:18

Friday, Apr 04, 2003 at 07:18
where did you purchase it and, if you don't mind me asking, for how much?

Cheers ;)
FollowupID: 10435

Follow Up By: KiwiAngler - Friday, Apr 04, 2003 at 09:43

Friday, Apr 04, 2003 at 09:43
I bought it from North parramatta Powerhouse, from memory cost was about $98.

I have had it for about 6 months now and it works well, both for actually re-charging the Toshiba battery and for when I am using the unit in the car.
FollowupID: 10446

Reply By: Cruiser - Friday, Apr 04, 2003 at 10:19

Friday, Apr 04, 2003 at 10:19

I also have one of the Energy Knights from Kerio that I use in a 100 Series Landcruiser.(

Cost me $98 from Dick Smith Electonics here in Perth. Can power and recharge almost any Notebook (that has an external power supply). Comes with mutilple adaptors (including the one for Dells that I use).

Cannot fault it. Works perfectly.


AnswerID: 16861

Reply By: Member - Neil & Lynne - Friday, Apr 04, 2003 at 19:29

Friday, Apr 04, 2003 at 19:29
Hi Gob

We debated also which way to go and decided on a 12v supply for our laptop. Ordered a Targus Auto/Air adapter from an online supplier in Qld last week which should have been delivered early this week. Phoned the supplier when it hadn't arrived by today and was told they didn't in fact have any in stock.

After seeing the recommendations here for the Kerio Energy Knight1, I phoned our local Dick Smith and had one in my hot little hands within 30 mins for $98 (half the price of the Targus :).

Thanks for the tip, guys.Life's too short to say .. I can't do that
AnswerID: 16892

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