"Red" Scholefield is pretty much the "word" when it comes to batteries in this hobby/industry. He runs a website called [link=http://www.rcbatteryclinic.com]www.rcbatteryclinic.com[/link] . He's got an article on his site dealing with storing batteries when not in use. That can be found here : [link]http://www.rcbatteryclinic.com/storage.html[/link] .

Luckily here in Oklahoma we never really have to shut down flying for the winter, so I really don't have to deal with storing batteries. But I usually replace my packs every year anyway. IMHO it's cheap insurance to save a plane.

Ken