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Posted by Jim Higgins on 04/13/06 13:41
On Wed, 12 Apr 2006 17:54:44 GMT, George Graves <gmgraves@pacbell.net>
wrote:
>In article <0001HW.C0620DEB000A743DF02B4530@newsgroups.bellsouth.net>,
> Tim Murray <no-spam@thankyou.com> wrote:
>
>> On Apr 11, 2006, zara wrote:
>> >> He says he's technical, yet ANYBODY who has even a modicum of
>> >> understanding about simple physics woud realize that its IMPOSSIBLE to
>> >> charge a battery up to a 50 hour cycle time in three minutes unless the
>> >> player drew nanoAmps (10 to the - 15) of current - I.E. not enough to
>> >> even power a pair of headphones, much less a flash memory.
>> >
>> >
>> > Not only is it possible, but done on an everyday basis, buy the military.
>>
>> By technology developed on Macs at Interlochen.
>
>You guys are getting too nit-pickey in your old age, I obviously meant
>in a CONSUMER product not a military product. To charge - say- a set of
>rechargeable double-A cells up to 50-hour life in three minutes so that
>they could power a mini-disk or MP3 player, one would literally have to
>use refrigeration on the battery (ies) and use a high-voltage/ high
>current charger and active electronics to monitor/control the charge.
>And good luck getting UL approval.
Relax. No one - not even the military - is charging for 3 minutes to
get a 50-hour life unless the device being powered requires only a
tiny portion of the battery capacity over that 50-hour period.
>With standard batteries/chargers you'd have to rely on the player itself
>being very low current device. I have an older Sharp minidisc player
>which uses ONE AA cell and it can get six hours out of a single alkaline
>and about 4-4.5 hours out of a single Ni-Mh Double A. which I consider
>remarkable given that the player has a motorized transport spinning a
>disc the whole time it's being used. But to get 50 hours of battery life
>out of the same type of device. One would have to lower it's current
>draw by an entire order of magnitude while recharging the batteries with
>a high voltage charger without having them blow-up or burn-down the
>house.
Exactly!
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