I know in the case of Canon the purpose of the chip is to give the camera more information about battery consumption rather than prevent the camera from using it, you can with my 7D associate a particular battery with the camera so it can monitor it's performance.
I tend to use original batteries however if I was to go 3rd party then I would look for a reputable name rather than some unknown brand on ebay for example Hahnel.
I had a quick look and for
this which is a genuine panasonic one according to the picture that is .