RE: Reciever battery?
Look around on ebay and stuff, and find [link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXHFP0&P=7]this[/link] charger, and enjoy the faster better charger.
*edit*
[link=http://search.ebay.com/Traxxas-Power-Charger-Revo_W0QQfromZR8QQfsooZ1QQfsopZ1QQfstypeZ1QQssPage NameZRC0022]Here[/link] are a bunch of them.