I'm surrounded by devices that owe their lifeblood to Li-Ion rechargeable batteries. And as most devices are now built in such a way that it makes replacing the battery is tricky - not to mention expensive - you want to get the best possible lifespan out of that battery.
How much of a difference can taking care of the battery actually make? In my experience, a lot. I have both a second-generation iPod nano that I bought around December 2006, and a first-generation iPod touch I picked up in 2008 that are both still going strong on the original battery.
So, how do you get the most out of Li-Ion rechargeable batteries?