I read at a photo.net thread that the trick to getting 10fps out of the HS is not using the rechargable battery pack but actually because the recharge pack depresses a pin in the body that tells the camera to cycle faster.
The thread included a photo of the hole in the AA packs which do not depress the pin therefore not telling the camera to cycle faster.
Naturally they told methods to close off the hole so the pin is depressed with either battery pack.
The thread was four years old already.
Do any of you have much knowledge of this.