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| Date: | Thu, 19 May 2005 09:12:35 -0600 |
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well, the less expensive the product, the less circuitry is likely going to
be involved inside it.
In the case of laptops, they do indeed have a shut off circuit that allows
them to be plugged in all the time without compremising the battery.
Most higher quality or upper end battery operated components do have auto
shut off circuits built in...but most HT's and scanners and battery operated
tape players, or almost anything in the common every day consumer market
that runs on batteries that can be recharged using an external wall wart
will not have these circuits built in...why? because the manufacturers put a
lower priority on that type of thing and dont want to spend the extra money
or take up extra space or engenieer the circuit to fit into the product due
to costs and resources and such.
You will rarely find out weather a product has an auto shut off circuit by
reading the specs...but you can be assured almost all the time that if you
buy a quality product that runs on batteries and has the ability to be
recharged, it will probably have one.
I ampretty sure most high end HT's have these types of circuits built in
already.
----- Original Message -----
From: "Bob Humbert" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Thursday, May 19, 2005 8:53 AM
Subject: batteries
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> Ok, wht is the scoop on rechargeable batteries? In this day in time, =
> why can they be over charged by leaving them plugged in? How difficult =
> is it to include a circuit to detect a full charge and turn itself off? =
> I just don't understand this. I know that it is true but I just don't =
> understand it. Unplugging my laptop is a real pain but I do it because =
> the batteries are so very expensive. HT's can't run on the charger =
> provided but they seem to be able to work with a much larger one. =
> Again, plugging in and unplugging a HT that is simply listening most of =
> the day is a real pain! Lazy? perhaps I am but it doesn't seem to be =
> such a challenge to design circuitry to allow those kinds of things to =
> be plugged in all of the time. Talking book tape players is another =
> example of a real nuisance. Can someone give me a good explanation why =
> this isn't being done?
>
>
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> <DIV><FONT size=3D2>Ok, wht is the scoop on rechargeable =
> batteries? In this=20
> day in time, why can they be over charged by leaving them plugged =
> in? How=20
> difficult is it to include a circuit to detect a full charge and turn =
> itself=20
> off? I just don't understand this. I know that it is true =
> but I just=20
> don't understand it. Unplugging my laptop is a real pain but I do =
> it=20
> because the batteries are so very expensive. HT's can't run on the =
> charger=20
> provided but they seem to be able to work with a much larger one. =
> Again,=20
> plugging in and unplugging a HT that is simply listening most of the day =
> is a=20
> real pain! Lazy? perhaps I am but it doesn't seem to be such a =
> challenge=20
> to design circuitry to allow those kinds of things to be plugged in all =
> of the=20
> time. Talking book tape players is another example of a real=20
> nuisance. Can someone give me a good explanation why this isn't =
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