These batteries are great. I love the fact that DJI has not changed their battery style for the past 3 versions of their Action cameras and these work perfectly in my Action5. The Ah of these batteries is actually slightly higher than the stock battery that came with the camera and I’ve had no issues with the time that they last and in most cases, I have changed the battery, not because the old one was expired, but because I needed to start filming a new segment and didn’t want a battery to die in the middle of it. They charge quickly and last a good long time. They fit perfectly in the camera and remove just as easily. I haven’t noticed any swelling of the batteries at all, which can happen with some after market batteries. The one issue I’ve had is with the charger. When plugged in, a battery that is not fully charged will provide a red light, indicating that it is charging and it is supposed to turn green when fully charged. I have found that this charger never turns green automatically and it is only after I wonder what is taking so long, and I unplug the battery and plug it back in to the charger, that the light suddenly turns green, indicating that the battery is fully charged. Putting the battery into the camera at that point also confirms that it is at 100%. As long as you know that is how the charger reacts, it is very easy to work around that. Just a great set at a great price and like the title says, a very economical way to get spare batteries for you Action cameras.