from the article: "It's recommended to perform partial discharges to capacity levels of 20~30% and frequent charges, instead of performing a full discharging followed by a full charging."

with my manlish skill, i think it means that the most, use it up to 20-30% remain... BUT frequent charges is also recommended = just charge whenever u can, even if still got 90%...

also, interesting to know, if u wanna store battery for long time, best store your battery with only 40% capacity...

there is also an interesting info on charge time from apple; 2 hours to charge battery to 80%, 2 more hours to charge the remain...

(according to those articles) it is true that after a large number of cycle of charges, the capacity will drop BUT a complete cycle is not count as how often u charge... say, u have 80% left, charge back to 100%, and do that 5 times, u only complete 1 charge cycle.

at least that is how i understand it... and i do practice that...

+1, this is what i highlight in the 1st few page