A throwback in the wrong direction ....

Clearly, the battery had to be small to fit into the smaller chassis.
On the other hand, the technology has evolved, so a duration of one hour is disappointing.
So I had to set this replacement battery logically, to give a total of about 2 hours duration.
That's why for me a star deduction!
The second star, I prefer as usual from the overpriced GoPro Price, where I could buy the battery here at Amazon for currently favorable 17.
An extra praise to the Amazon service (the lady called Jutta) that I could get the goods today, so even one day before the planned vacation.

Am now on holiday and very annoyed, have therefore decided to withdraw two other stars.
The battery has a shameless self-discharge, battery is fully charged, two days later in an important event not to bring it out in the hope to continue to make films, the battery shows only one line at!
So GoPro can mess up a filming of a one-time event.
Too bad the two week return period is over, you would have these things shall all return to GoPro, even if the manufacturer of the batteries are not.
In this form should not be allowed to be sold.