"Thomas T. Veldhouse" <veldy71@yahoo.com> hath wroth:

>In alt.cellular.cingular John Navas <spamfilter0@navasgroup.com> wrote:
>> On Thu, 16 Nov 2006 06:51:52 -0800, SMS <scharf.steven@geemail.com>
>> wrote in <455c7b04$0$88640$742ec2ed@news.sonic.net>:
>>
>>>Toshiba has Li-Ion batteries coming that can be fully charged in 10
>>>minutes. The company claims that they will be out in 2008.
>>
>> [yawn] We've had 15 minute NiMH recharging for quite some time.

>Yes, and it significantly decreases the life of the battery ... they simply
>get too hot!

Bad assumption. I've done some experiments in very fast charging NiCd
batteries at rates up to about 200 times the rated current to see what
happens (Learn By Destroying). The battery does not get warm until
overcharged. The trick is to determine when to stop charging. I
think I scribbled something on my tinkering in the past....
| http://groups.google.com/group/ba.in...a0088af9dd770d
As far as I can determine, I've seen no accelerated ageing problems
with such fast charging as long as I don't go over about 95% of full
charge. Those where I have exceeded full charge and have started
heating have died prematurely (or exploded). My guess is that the
only reason this is not being done in production units is the safety
issue. One mistake in such a fast charger and we have an explosion of
attorneys.

--
Jeff Liebermann jeffl@comix.santa-cruz.ca.us
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558