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.
No âaverageâ attention span. There is simply no number that can be put on an attention span. Consequently, there can be no average. Some of us can focus on a three-hour concert, but fifteen minutes spent doing our taxes will leave us bored and begging for mercy. For others, the opposite is true.