> shallow cycles dramatically improve battery longevity. Not necessarily; cycle depth is a big factor, but the interval covered is very important as well. I.e.

> shallow cycles dramatically improve battery longevity. Not necessarily; cycle depth is a big factor, but the interval covered is very important as well. I.e. a few cycles to a high charge end voltage ages cells more quickly than more cycles to a lower charge end voltage. This obviously directly relates to the amount of energy stored. The correlation is approximately exponential: you get somewhere between two to eight times the cycles for lowering charge voltage by 50-100 mV. You very quickly get to zero cycles raising it. Another factor is cycle length, i.e. cell current, and temperature, as always.