Amazon.com.au:Customer reviews: Artman GoPro Hero 5/6/7 1500mah Replacement Batteries (3 Pack) and 3-Channel LED USB Charger with Type-C Port for GoPro Hero 7 Black,Hero 5，Hero 6 Black,Hero 2018(Fully Compatible with Original)
I love this charger. Suprisingly good buy for the price. It's smaller than I first thought & neatly easily fits in my Gopro pack which is perfect for travelling. I cycled the batteries through twice with no issues. This is an awesome accessory for the GoPro series.
Charging 3 batteries all together. Usage time is equivalent or close to the original battery. I've also own another charger with similar design, the battery drains fast when leave it in a long time after unplugged, not sure if this one does the same thing.