The biggest issue I have with Lithium rechargeables is they are going to wear out in 3-4 years no matter how you care for them. If you try to keep them between a certain % and remove from your laptop to keep away from the heat you may prolong the life by a few days but remember they loose some of their capacity no matter what you do.

Battery University looses some credibility when they lump NiCad and NiMH together listing them as having the same disadvantages, I know they over simplified but when you over simplify to the point of giving wrong information.

You still can't get lithium-based (to over generalize as they did) batteries that will retain 90% of their capacity after a decade like NiMH yet the sites like these are always down on NiMH (or Nickle based as they put it).