Another wrote to me: > Lithium ion batteries when optimally used should last for 3 years. > Optimally means you have to keep them at 80% charge always > and low heat.
Lithium batteries are rated by their discharge cycles. Current technology is 300 deep discharges (I believe another also posted that number). Latest technologies will be rated for 500 discharges. IEEE Spectrum (maybe one year ago) has an engineering article about this. For example, some HP laptops have these longer lasting batteries in consumer testing now. Well, if you keep the battery fully charged, then its life expectancy is longer. For example, American Prius have less MPG than other Prius because EPA regulations also require the battery to last longer. So American Prius do not discharge their NiMHd batteries below 50%. Less deep discharge cycles means longer battery life expectancy. Laptops are not for using a computer anywhere. Laptop batteries are for moving a computer or for temporary power outages. To use them in the rare situation where power is not available. Those who use a laptop as if you just refill it like gasoline in a car end up paying $hundreds for new batteries. $hundreds because laptops are intended to always be on AC if AC is anywhere available. --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "MyLUG" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/mylug?hl=en -~----------~----~----~----~------~----~------~--~---
