Absolute recommendation for each of a GoPro has. For 35 I got two batteries and a charger with which I invite even go came the lighter socket. There is a battery of the original GoPro battery in no way inferior. Long-term experience lack, but am in good spirits, if you handle it properly should fit. I have no problems, that the battery allegedly not stuck in the housing, absolutely the same product.
Update: 17/09/2012
So far I have changed, used and replaced the batteries and have the impression that the battery currently better and lasts longer than the originals. I'm curious to see how long the battery just carries on as before. Just buy it so far!
