Yesterday I was reading the contents of the batteryuniversity site. Much information. I got surprised to learn that Lithium-Ion batteries (those in the Nikon DSLR cameras) should be recharged frequentely and shouldn't have their charge level drop too low or be stored at 100%. Do you DSLR users think this happens to be true in practice or its just theory? I am curious to know specificly about the D200 batteries from our fellow users. I was charging it all the way, storing it at 100% and using it until it reaches zero. The site recommends to store the battery at about 40%, avoiding to store it at 100% and never at 0%. The D200 manual is unclear about methods for recharging. It just warns the user not to allow the battery charge to be kept at 0%. So, in the real world...how do you store and recharge your battery? And also, how well is it living? Cheers.