Spicy Gadget Rolls has some basic tips on extending the life of Lithium-Ion (Li-ion) batteries, commonly found these days in cellphones, laptops, mobile media players, etc…

Battery Storage – If you plan on not using the Lithium battery for prolonged periods of time, then you’ll want to have the charge level at 40% and place the battery in the fridge (not freezer). Storing the battery at 100% charge level applies unnecessary stress and can cause internal corrosion. On the other hand, if the charge is too low, the battery can become permanently unusable, due to battery self discharge. This is why manufacturers recommend storing your Lithium battery at 40% charge, rather than either extreme.

4 Tips to Extend Your Lithium Battery Life [Via] –Link