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View Full Version : G46 AC adapter power requirements?



shakado
02-24-2013, 07:54 AM
What are is the minimum output for an ac adapter needed to power the g46 laptop? Want to see if I can replace that massive power brick with a smaller one from kensington.

JwPwns
02-24-2013, 03:32 PM
as long as the output on the adapter is 19v and 9.5A and the adapter fits then it should work, i have been looking for something to replace mine too still searching for something that's close to or above 9.5a

shakado
02-25-2013, 12:30 AM
Is that around 120w? If so then the Kensington 120w universal adapter might work. Found a couple on ebay. Dont know if there are compatible charger tips though.

fostert
02-25-2013, 03:59 AM
Is that around 120w? If so then the Kensington 120w universal adapter might work. Found a couple on ebay. Dont know if there are compatible charger tips though.

The wattage or power delivered by an AC supply is the Volts it outputs multiplied by the amps of current pushed by the volts. So, if the G46 supply is rated at 19 V at 9.5 A, then this is a 19x9.5=180.5, or a ~180 Watt supply. I don't own a G46 but that seems awfully high: check the sticker on your current adaptor for the ratings.

Anyways, you can get *any* other DC supply, so long as a) its the same voltage, b) its total rated Watts is greater than or equal to your current one, and c) the polarity of the plug on the end is the same as your old one (i.e. if the hole in the centre of the plug end is "+" or positive, get one like that). You will not hurt the laptop by plugging in a supply with more Watts than what you have now, so long as the volts match. You may hurt the laptop (or more likely just overheat your adaptor) if you use a smaller wattage adaptor than your current one and you run heavy apps (like games) on your laptop. The laptop will not draw 300 Watts from 300 W adaptor if you plugged one in: it will only draw what it needs, so a 300 W would work identically well to a 180W one (but a 300W would be a monster adaptor!). But it will try and draw 150 Watts from a 120 Watt supply (for example, assuming that laptop is rated to use 150W), and thats a bad thing.

Be aware as well that using a higher wattage adaptor will save you power $$, because if the laptop only wants half of the adaptor's full rated power, then the adaptor is operating at 50%, usually its most efficient range (i.e. the most power from the wall socket is actually converted to DC, and the least is wasted as heat).

Alot of people (me too) use higher wattage supplies at home for this reason, for when my laptop is plugged in at home as my desktop replacement. Then you just carry the minimum wattage adaptor with you for on the go.

shakado
02-25-2013, 05:53 AM
Yea thats exactly what I plan to do, just leave that huge asus adapter at home and carry the much smaller kensington one around. Laptops comin in tmr, so hopefully theres more detailed info on the power draw in the manual, or maybe one of the asus moderators will provide more info.

Pitcher@asus
02-25-2013, 08:14 AM
i think too smail is unable to power on G serious laptop.

rewben
02-25-2013, 08:56 AM
thanks @fostert! i will get the 230w :D

JwPwns
04-08-2013, 04:52 PM
I left my adapter at home -___- anyone know if bestbuy or other big brand store carrying compatible ones? I can't wait few days for shipping. Also searched ebay for kensington adapters earlier but havn't found any 180w or higher