<VV> Lithium-Ion Batteries (NO CORVAIR)

[Harry Yarnell]

I thought you SHOULD completely (almost) discharge a NI-CD before
recharging, or it would take on a 'memory'.

-----Original Message-----
From: virtualvairs-bounces at corvair.org
[mailto:virtualvairs-bounces at corvair.org] On Behalf Of FrankCB at aol.com
Sent: Sunday, December 11, 2011 1:04 PM
To: jld at wk.net; virtualvairs at corvair.org
Subject: <VV> Lithium-Ion Batteries (NO CORVAIR)

Jim,
 
What you are describing applies to Ni-Cd  batteries, not Li-ion batteries 
that are now being used in most  laptops.
 
" The  smaller the depth of discharge, the longer the battery will last. If 
at all  possible, avoid frequent full discharges and charge more often 
between uses. If  full discharges cannot be avoided, try utilizing a larger 
battery. Partial  discharge on Li-ion is fine; there is no memory and the 
battery does not need  periodic full discharge cycles other than to
calibrate the 
fuel gauge on a smart  battery."
 
_http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_bat
teries_ 
(http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_bat
teries) 
 
Regards,
Frank Burkhard
Boonton, NJ
 
 
In a message dated 12/1/2011 10:00:48 P.M. Eastern Standard Time,  
jld at wk.net writes:

For maximum  life Li-ion batteries should be fully discharged every 
month.  If not  discharged completely they develop a memory.   That is 
what my  HP computer manual says.  They recommend disabling the power 
monitor  function  so the system will fully discharge.   The HP is only  
one year old so we will see!
Jim Davis

On 12/1/2011 11:52 AM,  FrankCB at aol.com wrote:
> How will "they" be able to add road taxes to  your electric bill since 
lots
> of people will be using NO electricity  for car usage?  At least with
> gasoline, almost ALL of it is used  to power vehicles for road use.   
However, it
> will take  separate meters to differentiate electricity that is used  for
>  vehicle use from electricity used to power electric heaters, A/C,   
dishwashers,
> refrigerators, dryers, et al.
>
> If  lithium-ion batteries are so long lived, then why do the ones we use  
in
> our laptops die out after 4 or 5 years?  The first one I got  with my Dell
> lasted a little over 4 years and the second one is  already down almost 
40%
> in  capacity after about 3 years of  use.  My usage is primarily plugged 
into
> 120 volts AC with only  very occasional use on only the Li-ion battery.
> What aging experience  do the rest of you get with the Li-ion batteries in
> your  laptops??????????
>
> Frank Burkhard
> Boonton,  NJ
>


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