[Yaesu] HAZARD-Charging LITHIUM battery vs Temperature

[Keith Dutson]

It's nice to finally see a post with actual information rather than the
alarmist term "cold."  Can you imagine someone out in freezing weather
trying to plug in a charger to charge their laptop!  They deserve to have a
failure. <grin>

The batteries in a vehicle likely have different charging/discharging
characteristics than the typical battery being discussed here.  I do not
work in the auto industry so have no specifics.  However, a friend of mine
does work for one of the big 3 and I could possibly get info if anyone is
interested.

73, Keith NM5G

-----Original Message-----
From: yaesu-bounces at mailman.qth.net [mailto:yaesu-bounces at mailman.qth.net]
On Behalf Of kc3vo at aol.com
Sent: Thursday, March 05, 2009 10:21 AM
To: WBrown at e1b.org; yaesu at mailman.qth.net
Subject: Re: [Yaesu] HAZARD-Charging LITHIUM battery vs Temperature

Go to: "batteryspace.com" --click on SAFETY (at the top of page) scroll
down, and READ about charging.--There are other, similar sites! 
(OR-IGNORE this, charge the batteries at 20 degrees F, or above 120 degrees
F, and do not complain if you destroy the battery, or produce a fire! As
they say, I have "led the horse to water, but I cannot make him drink"--In
the end, it is YOUR battery, your house, your money-do as you please!
(although many devices have temperature sensing, to PREVENT such abuse, for
reasons of liability)73, KC3VO, Bob Curry


-----Original Message-----
From: WBrown at e1b.org
To: yaesu at mailman.qth.net
Sent: Thu, 5 Mar 2009 11:06 am
Subject: Re: [Yaesu] HAZARD-Charging a new battery for VX5R



Can someone substantiate these claims with links to reference material?
Preferably no stories about a friend who had one blow up on their kitchen
table or about laptop batteries burning up their truck. :)

--
May you solve interesting problems

William Brown
KB2TOY

KC3VO wrote on 03/05/2009 11:00:04 AM:

> It is true for perfectly GOOD Lithium ION/Polymer batteries! At or 
> below 32 degrees F, charging will cause pure lithium to plate out of 
> solution, rendering the battery hazardous, and damaging it. Good 
> chargers will not charge in a cold environment because of this! (If
all
> else fails, read the manual) High temperature charging varies
according
> to exact battery chemistry and charger type, but most are not advised 
> to be charged above 110 degrees F, many have even lower limits. KC3VO, 
> Bob Curry
>
>
> -----Original Message-----
> From: Keith Dutson <kdutson at sbcglobal.net>
> To: KC3VO at aol.com; tsjohnson at jsb-partners.com
> Cc: yaesu at mailman.qth.net
> Sent: Thu, 5 Mar 2009 9:33 am
> Subject: Re: [Yaesu] Charging a new battery for VX5R
>
>
>
> AFAIK this is only true for defective batteries.
>
> 73, Keith NM5G
>
> -----Original Message-----
>  From: yaesu-bounces at mailman.qth.net
> [mailto:yaesu-bounces at mailman.qth.net]
> On Behalf Of KC3VO at aol.com
> Sent: Wednesday, March 04, 2009 12:19 AM
> To: tsjohnson at jsb-partners.com
> Cc: yaesu at mailman.qth.net
> Subject: Re: [Yaesu] Charging a new battery for VX5R
>
> Do not charge LITHIUM batteries in the COLD!  Attempting to do so, you 
> will separate out the LITHIUM metal, as a pure electroplate, and 
> damage the battery/create a firebomb, if the charger does not stop 
> you! These,
and
> most
> other batteries should be charged at normal room temperature, near 75 
> degrees F.
> Other batteries may charge poorly, but it can be DANGEROUS to charge a 
> litium battery that is too cold or hot!
>                                                    Please be 
> careful!--73, KC3VO-Bob Curry **************Need a job? Find 
> employment help in your area.
>

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