On 11/6/2013 1:23 AM, Bob Blick wrote:
>
> PS My experience with LiFePO4 so far: I also have a Philips brand solar
> light that I purchased a couple of years ago, it has a single LiFePO4
> cell and kills them after 100 days, so I know that you can't just
> trickle into them and expect many cycles!
>

The end voltage of a lithium battery is very dependent on temperature.=20
You must have a good, real, temperature reading to know the float=20
charge. And as M. Adam wrote, they do not like to be floated. You should=20
charge until you hit the peak voltage (peak set by Vmax - Temp * coeff.)=20
and then quit charging until the voltage drops below a threshold.

I can't quote numbers because it was a couple years ago that I worked on=20
this project. (An ~8-cell lithium UPS)

-
Martin K
--=20
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