ASUS Battery Information Center. The battery pack's service life will depend on the environment temperature, humidity, and notebook PC usage. The battery capacity usage versus cycle performance attenuation follows a linear type curve. Lithium-ion (Li-ion) batteries typically have a lifespan of between 300 and 500 cycles.
1 Some state that the average human attention span is approximately 5 minutes; others state that most healthy teenagers and adults are unable to sustain attention on one thing for more than about 20 minutes at a time, although they can choose repeatedly to re-focus on the same thing.
U.S. adults now spend an average of two hours and 21 minutes per day using their mobile devices for activities other than phone calls, up 46 minutes from last year. Time spent on smartphones, tablets and feature phones now also exceeds time spent on PCs, which clocked in at two hours and 19 minutes. The figure for PC use may seem low to any office worker who spends most days in front a computer screen, but eMarketer is taking all U.S. adults into account, some 20% of which still don't use the internet, according to Clark Fredrickson, VP-communications at the research firm.