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Q: Cordless Hairdryer ( Answered 4 out of 5 stars,   7 Comments )
Subject: Cordless Hairdryer
Category: Sports and Recreation > Outdoors
Asked by: chrisant-ga
List Price: $3.00
Posted: 22 Aug 2005 17:59 PDT
Expires: 21 Sep 2005 17:59 PDT
Question ID: 558992
I am looking to find a cordless hairdryer for sale. It can be battery
operated or have a charger or whatever.. it just can't be the type
that plugs into the wall. (It is for camping).

Where can I buy one? Thanks!


Request for Question Clarification by nenna-ga on 23 Aug 2005 14:57 PDT
I worked in beauty supply for many years, and I NEVER saw what you're
asking for, but got asked all the time. I hope someone can find you
one. Did you see one somewhere before?


Clarification of Question by chrisant-ga on 23 Aug 2005 15:28 PDT
After 2 years of searching I was about to give up when I went into a camping
store and the employee told me he didn't carry it but he was CERTAIN
they made them because he used to carry it! That's  I have never seen
one myself, but I hear it's out there...

Request for Question Clarification by hedgie-ga on 18 Sep 2005 05:10 PDT
This just  to quantify what Moarin already sugested:

  A hair dryer uses about 1200W of power. If battery would provide 12V,
  it would draw  about 100A - meaning that a car battery would support it for
  less then hour. 

  So, you may need to specify what you mean by cordless:
 1) No wall outlet, but wire to a battery on the floor is OK, 
 2) handheld (with built in recharchable battery) and then, max weight and 
  how long it should work between the charges?

  That will determine if it is possible or if the clerk  was mistaken.

Clarification of Question by chrisant-ga on 19 Sep 2005 07:24 PDT
Handheld (with built in recharchable battery).
The max weight should be anything an average woman can use with some ease..
How long it should work between the charges? Well, at least 4 minutes
would be enough.

Is it possible?
Subject: Re: Cordless Hairdryer
Answered By: hedgie-ga on 19 Sep 2005 08:44 PDT
Rated:4 out of 5 stars
Unfortunately, Chrisant, it is not possible with the current technology.

 Since answer depends on actual values, let's get quantitative.

 Bear with me, it will be simple:
  I weighed a small hair dryer and got 300 grams. (Its power is 1600W)
  Then I weighed a decent NiCad battery. It was 320grams (Sharp video camera)
  Thus this battery, if built-in, would double the weight and make the dryer
  quite heavy (620grams = 1.3 pounds)

  So, it would last about 4 Ah / 200 A = 3600 * 4 s/ 200A = 36 * 2 seconds

 Thus for this hairdryer, the battery would go dead in 72 seconds. 
  This will give you some idea how much power  heater-type appliances use.

 Your quest for a cordless pre-chargeable re-chargeable hair dryer for camping
looks like it will be a long time in coming. Sorry about that.

 We did not consider case of having a battery on a belt (connected by cord)
 or using very expensive Lithium battery. I guess we still would not make it
 (but we could try to check that option (as a new question, I would hope))


PS. to convert grams (g) to ounces, just type into a (good) search engine 

620 g in ounces

to get
 	620 grams = 21.8698564 ounces

like this 

 	620 grams = 21.8698564 ounces
 	620 grams = 21.8698564 ounces

Clarification of Answer by hedgie-ga on 19 Sep 2005 18:26 PDT
Interestingly enough, if you go for Lithium batteries, you may be just
able to squeeze your specification in. Cost was not specified as factor!

This is area of active research (batteries for the electric cars) 
and so considerable progress is expected next decade. 

You need to differentiate between 
1) Lithium battery  (no-recharge, throw-away (meaning recycle! :-) 
    with- high cost per use and very light.
2) Lithium Ion battery, more expensive to buy, but less expensive per use.

For case 1) you can get battery storing 1kJ having mass of 1g for $.15  see
for actual batteries, one can buy today.

To operate 1200W appliance for 3 minutes you need 216 kJ of energy

That translate into a battery with mass of 216 g at cost of $32 per use.

In 10 years, that picture may improve:

"..lithium battery is not rechargeable and should never be recharged,
while lithium-ion batteries are designed to be recharged hundreds of

Costs of Lithium-Ion Batteries for Vehicles:

"..current and projected cost estimates for lithium-ion batteries, 
as a function of materials ... total mass of the battery pack is 364 kg 
(just under 800 lb), ..." (this is for electric cars)
 "expected cost for future electric car batteries "
hi-energy $250/cell   $20/cell for a typical 100A h cell

The science behind these numbers (namely why Lithium is 'best' ):
 having 41 kJ  per gram storage density, as a theoretical limit:

So, there is hope: Help is on the way.

chrisant-ga rated this answer:4 out of 5 stars

Subject: Re: Cordless Hairdryer
From: owain-ga on 23 Aug 2005 04:48 PDT
It's called a "towel" and can be purchased from any good department store :-)
Subject: Re: Cordless Hairdryer
From: myoarin-ga on 23 Aug 2005 12:58 PDT
I doubt that a battery operated hairdryer would be able to have enough
power to heat effectively.
Subject: Re: Cordless Hairdryer
From: chrisant-ga on 23 Aug 2005 15:26 PDT
I thought the same thing.. not enough power without a plug... After 2
years of searching I was about to give up when I went into a camping
store and the employee told me he didn't carry it but he was CERTAIN
they made them because he used to carry it! That's when I decided to
post the Q here. I ahave never seen one myself, but I hear it's out
there but I can't find it anywhere! :-(
Subject: Re: Cordless Hairdryer
From: myoarin-ga on 23 Aug 2005 17:00 PDT
If I were going camping with you, I think I would prefer that natural
wind blo-dry look  ;)  But, of course, if this is for a film-style
safari with someone like Clark Gable, then it is a different matter. 
Hope you find one.
Subject: Re: Cordless Hairdryer
From: jakeblues-ga on 21 Oct 2005 15:56 PDT
Yes they DO make a camping hair dryer, but it is NOT cordless. It runs
off of 12 volts. So if you are camping and are close to your car..
problem solved! Just do a search for "12 volt hair dryer" on google
and you will find many retailers that carry them. They only cost about
$20.00, and come with an extra long 8 foot cord.

If you will not be close to a car, the only other option is to get a
12 volt power pack. These are basically small automobile batteries and
are quite heavy, so they may not be ideal if you wish to carry one
Subject: Re: Cordless Hairdryer
From: minimac-ga on 29 Dec 2005 01:06 PST
A while ago I was thinking of designing a cordless hairdryer, and
while I was researching the subject, found that two hairdresser
brothers have beaten me to it! The product brand is called "Oobi" and
was launched last year, but apparently Boots are interested in
retailing it in the UK, so it may only be a matter of time. Apparently
it works with a gas cylinder and battery, but if you want to read an
article on it visit:

Also an article here (you have to scroll down a bit tho)

There is version of it on sale already, but it's not a cordless one
yet, altho the style is the same:

Hope that helps!
Subject: Re: Cordless Hairdryer
From: xhable-ga on 20 Jun 2006 13:54 PDT +
+ =
answer :p

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