Go to Expo, Sitex is on and Eastgear have promotion on batteries and chargers.
Trade in old charger for $10 discount on C800, C801, C808 and C9000
Trade in 4pcs of old AA/AAA batteries and get PowerEx Imedion 4pcs at $16
No, I am not from Eastgear but have been using PowerEx batteries and chargers for quite a while.