We are all aware of the prices of the original batteries for the Go Pro Hero 13 action cameras and I consider these batteries to be an excellent alternative in several aspects. The battery performance in my opinion, for being competitive batteries, is more than decent. Obviously, compared to the originals, they are slightly shorter in duration. We are in the order of total duration between an hour and 2 hours, depending on the type of format with which you are recording. If you want to make a percentage comparison with the original ones, they last 20/ 30% less. The good thing is that they recharge fairly quickly and with 3 batteries you have the possibility of having a fairly high and almost perennial reserve, since since one battery is discharging the other 2 are ready for use and you can automatically recharge that empty one. The case is a power bank and allows you to further recharge the batteries even without the need for an electrical source, provided that the power bank has been recharged first. The battery charger functionally speaking is compact, which makes it easy to carry in a bag and can be used as a box for transporting the 3 batteries, in order to preserve them from damage. The 3 charge status LEDs are green or red depending on whether the charge is full or not. We can also use the charger to recharge the original batteries. The quality of the materials is excellent, like practically all the products of this brand. In conclusion, I can only be satisfied with this set of batteries + charger, so I recommend buying it to those looking for savings without losing too much in efficiency.