I can't find any reliable info on float charging LiFePo4 cells. It's quite clear that it's not possible to float charge Li-ion and Lipo cells, but LiFePo4 looks like quite different technology.
I'm interested in building a simple charger using a constant voltage with a very limited current (0.1C). I don't care about a charging speed and a maximal capacity, but I want to maximize a battery lifetime.
I looked into few datasheets but they deal only with classic CC/CV charging. I can't find any info about float charging. Is it OK to charge LiFePo4 with constant voltage (3.5V? 0.1C)? Is it necessary to remove voltage when charging is finished?