RCU is a nice place. But every forum is different in it's strong suits and where it's lacking, both in information and it's users. I haven't spent too much time at RCGroups, but I've noticed they have users who are probably the most knowledgable on rc forums when it comes to Lipos and chargers. I don't know why but there are many users on RCGroups who run high voltage planes and Helis with sick chargers that monitor and record everything which then gets posted on the forum along with discharge graphs and a few c -ratings tests as well. Makes for good reading when choosing a new battery.