Generic Camera Batteries Spare Battery Pack I Bought A New Camera And Want To Know About Batteries?

I bought a new camera and want to know about batteries? - generic camera batteries spare battery pack

I have a new Sony Cybershot and want a replacement battery. Sony sells for $ 50 on the eBay site is available, but it is common for half price, plus shipping. My question is, even if it is 100% compatible with the generic camera battery can eventually cause damage or even destroy the camera ???????