For GoPro camera such batteries are certainly essential if one is sometimes just go and have a chance just to create this video exactly at this location at this time - and the battery gives up the ghost! The change is done quickly and easily.
I'm actually not a fan of third-party goods, because I specifically also related to batteries in the past had a bad experience, because I wanted to save a few times Mark or Euro. However, this battery seems to do a very good service and holds almost as long as the original battery. Since it is just even occasionally, when the main battery is empty, used, nor can "damage" caused to warn the manufacturer of third-party products.
Conclusion:
Very good battery with good maturity at an affordable price.
