We have two Dell Latitudes that have performed ably for a very long time. Two weeks ago, the battery died on Cam's. He was devastated. We all use them for writing offline, and Cam generally writes in bed before falling asleep. So I knew it was going to have to be replaced quickly! Our local stores charged an arm and a leg for new laptop batteries, so after several hours of fruitless hunting, I went to Duracell Direct, and found the ideal replacement battery.
DuracellDirect offers batteries for a big range of computers: Apple, Fujitsu, Dell, Gateway, e-machines and more. Best of all they offer significant discounts for ordering online. The Li-ion battery for the Latitude retails for $138.00. But by ordering through Duracell, we got it at $116.00. They back their batteries with a 100% satisfaction guarantee.
These are 14 hour charge batteries, though with heavy use we get 9-10 hours continuous use without charging, which isn't bad. Installing it is remarkably easy. Simply remove the old battery and pop in the new one, and since these come fully charged, you're ready to go. Though replacing the battery is somewhat expensive, stacked against buying a new laptop, this is a very sensible alternative.