Li-ion footnote.

[Grow Pattern]

Jim,
          I don't do it by age.  (The chucking that is).

Li-ions will give you plenty of very good clues when to dump them.  Mine 
charge up and read about 8.48V unloaded with my C-volt meter. When they 
start showing readings like 8.3, 8.2 etc when fully charged, you will find 
that they give on el flight less and so on.

When I see that voltage drop I swap in a new one. Usually about two seasons 
on one battery with about 300 flights per season. (Approx)

Regards,

Eric.


----- Original Message ----- 
From: "Jim Ivey" <jivey61 at bellsouth.net>
To: <discussion at nsrca.org>
Sent: Monday, August 08, 2005 9:20 AM
Subject: Re: Li-ion footnote.


> Eric
> You bring up a point. How old is too old for a lithium-ion battery. I 
> chunk nicads after 2 years.
>
> Jim Ivey
>>
>> From: "Grow Pattern" <pattern4u at comcast.net>
>> Date: 2005/08/08 Mon AM 09:09:16 EDT
>> To: <discussion at nsrca.org>
>> Subject: Li-ion footnote.
>>
>>  I recently posted a note about killing a cell in a Li-ion pack when you 
>> charge it.
>>
>> A couple of data points.
>>
>> 1. These were packs that were two and three years old.
>>
>> 2. I could only get one to fail when the pack was heated up over 140 F 
>> externally. i.e. the sun.
>>
>> Never had one fail in any other way.
>>
>> Regards,
>>
>> Eric
>>
>>
>>
>
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