I have 2 Fuji batteries and 6 non Fuji batteries, Wasabi brand via Amazon. True, they do not last as long as the Fuji batteries maybe 50-70%, but they are only 1/3 the price for 2 batteries and the charger! I've had no issues with them. I'll usually keep the Fuji batteries for the X-T2 body and the Wasabi ones for the grip. Granted I'm not using this camera for professional work, as I have my Canon full frame gear for that (weddings, portraits)
I've also used the Wasabi brand in my Sony A6000 for a few years now also with no issues.
