Possible Duplicate:
What are some good practices for making sure my laptop battery serves it's full life?
How I should charge my laptop battery to have a long time life?
Possible Duplicate:
What are some good practices for making sure my laptop battery serves it's full life?
How I should charge my laptop battery to have a long time life?
This link over at Battery University explains the basics for lithium ion batteries, the most common type of rechargable batteries found in consumer electronics. Basically don't freeze or overheat the battery and don't frequently recharge and discharge the battery in short cycles.