I have had good results when storing Li-Ion batteries (and cells) at 40% charge and found lots of threads confirming this. What I haven't found is any data on if it makes any difference when setting the charge to 40%. If it should be charged to 40% and stop or discharged from 100% to 40% and then stop.
I have done both, but lately I have been favouring the latter. That is, I charge to 100% and then discharge to 40%. My thinking is that by charging to 100% initially, all of the chemicals have been mixed/distributed better, yielding potentially longer life.
Any one have any thoughts on this?