🚀 go-pugleaf

In article <dillon.0pa7@overload.Berkeley.CA.US> dillon@overload.Berkeley.CA.US  
(Matthew Dillon) writes:
> 
>     Believe it or not people use trickle charge circuits all the time to
>     extend the life of lithium batteries in backup situations.	This is
>     usually necessary only when the battery would discharge due to current
>     requirements long before it's normal shelf life expires.  With a proper
>     charging circuit you can extend the lithium batteries backup
>     capabilities all the way to its shelf life limit (5yr or 10yr usu).  In
>     applications where the shelf life would expire before the nominal mAH
>     of the battery is used up such a circuit is not required.
> 
WRONG.  Please checkout my domain name.   Hand Held Products, Inc.  I have been  
designing battery powered devices for over 10 years, now.  Every FedEx courier  
out there has a scanner of my design.  Among many other companies.  I know more  
than a little on the topic of batteries and their use/misuse.  With the  
exception of a few, VERY recent, VERY special, non-memory backup, lithium  
batteries, you NEVER charge a lithium battery.  Period.  Unless you are  
suicidal.  Remember that jumbo jet that went down in thailand a while back?   
One of the early things seriously suspected of causing the explosion was a  
shipment of cheap watches with shorted lithium batteries.  There are severe  
restrictions on the transportation of lithium batteries by air.  There are  
restrictions as to how many can be in a completed device carried on an airline.
When we use lithium back-up batteries, VERY careful consideration is given to  
the blocking diode's reverse leakage to INSURE no current EVER flows INTO the  
lithium battery.
> 
> 				    -Matt
> --
> 
>     Matthew Dillon		dillon@Overload.Berkeley.CA.US
>     1005 Apollo Way		uunet.uu.net!overload!dillon
>     Incline Village, NV. 89451	ham: KC6LVW (no mail drop)
>     USA 			Sandel-Avery Engineering (702)831-8000

I sure hope Sandel-Avery Engineering is not charging standard lithium batteries  
in equipment delivered to customer sites.

Jim De Arras
VP., R&D
Hand Held Products, Inc.
jmd@cube.handheld.com
WA4ONG@wa4ong.ampr.org