I have owned and reviewed several K&F Concept camera accessories, and have always been impressed with the quality in terms of design and manufacturing, especially when you consider how reasonably priced their items are. This 3 pack Osmo Action camera batteries and a charger is no exception.

As usual, the items come in a K&F branded box. Inside is the charger, the 3 batteries and the USB-C charging lead. Note, you will need a power supply. I used a multi-USB Fast Charger that I had purchased separately. The batteries did arrive drained, so I did need to charge them before use. Charging times are not especially fast, nor are they slow. Around 4 hours for all of them to be charged. I suspect it would be quicker if I were charging one at a time. My only minor criticism is that I wish there were a better indicator other than red or green. At least an amber, or better still, a percentage meter. However, considering the price, this is a minor quibble. With regards to use with my Osmo Action 5 Pro, the batteries worked really well. I have used two of the 3 so far. I was just shy of the advertised 120 minutes of recording time. I achieved 110 minutes the first time, and 118 on the second time. But those times are similar to the times I get with the original Osmo battery. I had no issues with the batteries feeling hot whilst they charged (they barely got warm, let alone hot), and having had other batteries from K&F, I trust them to be safe. All in all, they are hard to fault, and therefore worthy of the full 5 stars.