Generic Camera Batteries Spare Battery Pack Where To Buy Spare Camera Batteries?

Where to buy spare camera batteries? - generic camera batteries spare battery pack

I want to buy a spare battery for my camera and my video camera (Panasonic and JVC). On Ebay of branded generics and $ 5 in the camera shops that have the generic brand of $ 150. That seems a huge difference. Is it safe to not take eBay to work? And perhaps there is somewhere where you can be batteries for a little less than $ 150 to buy? (Like ... I would look into the camera stores, electronic stores, anyway?)