Thanks for the thread. I bought 3! I am tired of the Duracell rechargeables, as while they charge in 15 minutes, they completely discharge in a day or two if you dont use them. At least with these, I know I can leave them cooking and not have to worry about a memory effect. With 6 batteries, I should be set for many years to come. It is also nice to be able to just set your controller on top of the thing without having to remove the battery. Induction charge rocks!
Thanks again!
Quick edit: If you buy 3, the shipping charge is still only $5.00... Making them even cheaper! The replacement batteries alone are $13 each. So buying three is saving you, basically, $33 over buying separate batteries. Plus you get the extra cradles in case you have more than two controllers.