These batteries are excellent. I love that DJI has maintained the same battery style across the past versions, and these work perfectly with my Action 4. The capacity of these batteries is actually slightly higher than the stock battery, and I’ve had no issues with their runtime. In most cases, I swap batteries not because the old one is drained, but because I need a fresh battery to start a new recording segment without interruption.

They charge quickly and hold a good charge for a long time. They fit perfectly in the camera and remove just as easily. I haven’t noticed any swelling, which can be a problem with some aftermarket batteries.

The only minor quirk is with the charger. When plugged in, a battery that isn’t fully charged shows a red light, and it doesn’t automatically turn green when fully charged. I’ve found that unplugging and re-plugging the battery resolves this, at which point the light turns green, confirming a full charge. It’s easy to work around once you know.

Overall, this set is a great value. The included 3-battery charger is convenient for managing multiple batteries. While it isn’t fast-charging, the small batteries usually reach full charge in about an hour or two. For the price, it’s an excellent way to keep spare power on hand for your DJI Action 4. Highly recommended.