Thank you for the info everyone! :) Much appreciated, I learnt so much more than I than I thought I would.
-Sindhu S sindhu-s.com On Thu, Apr 23, 2009 at 11:43 PM, westom <[email protected]> wrote: > > 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 -~----------~----~----~----~------~----~------~--~---
