I have an MSP430 project here at home that runs off a single LiFePO4
cell and I'd like to charge it off a solar panel.

Capacity is not important to me, or efficiency, I just want the cell to
survive as many cycles as possible and not spend much effort with any
fancy charging methods.

I was hoping to be able to float it at some safe voltage, if there is
one. My maximum charge current is less than 0.1C.

My best guess is that somewhere below 3.4 volts is probably safe since
that's where a fully charged cell settles after a few days.

Any LiFePO4 experience out there?

Thanks!

Bob

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!

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