I would not have thought their would be much risk, but if you're worried use a voltmeter to check the battery output, and compare with your genuine batteries.

Basically all that is likely to happen with non-genuine batteries is that they won't last as long in operation, or they are an aged product in terms of the Lithium.

Lithium batteries have a finite life, which starts the moment they are manufactured, if the batteries sit on a shelf or are in use, they will still only last a maximum of three years before failing, and usually start to lose capacity after 12 to 18 months (think of laptop batteries).

Its possible they are repackaging old stock that has been on a shelf somewhere waiting to be encased in a battery pack specifically for your camera, but other than that I expect they will function correctly.

I have a mixture of Sony (Made in Japan) and Cameron Sino (Made in China) batteries operating my Sony HDR-HC3E and HDR-HC9 Camcorders, and I have had no problems relying on them.