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.
In order to increase attention span in children, they are engaged in a serious of activities with varying degrees of difficulty. The average attention span for a child is about 15 to 20 minutes. This attention span can be extended slowly.To improve the average attention span for a child, external stimuli are to be kept to a minimum. Other factors such as fatigue, noise, stress, and hunger need to be kept to a minimum.ttention span of children is the total time that a child applies to any task at hand. Less attention span will be marked by low concentration and easily distracted mind. Attention span of children increases with age. Normal attention span of a child is 3 to 5 minutes per year of the age.