This is a very handy, compact battery set for Fuji cameras. I personally have a Fuji X-T4, and that is the camera I tested these batteries with. The negative aspects of the unit: The unit doesn’t come with a power plug—it only comes with a USB-A to USB-C cord, which would allow you to plug the unit into some other USB power device that then plugs into the wall. The only other thing is that the LED display of the charger is on the bright side, and might need to be covered up with another item or some light dimming stickers, especially if you’re traveling with this charger in a small hotel room. This unit is very compact in size and would be very easy to travel with. The base of the charger is only slighter in surface area than if you were to lay the two batteries flat on a table next to one another. The batteries plug into the unit vertically, though, as the “butt” end of the battery makes a connection with the charging prongs of the charger. Also, the mobile charger appears to have two power inputs: A USB-C one (which would work natively with the USB-C cable included with the unit) AND a micro USB connector! This flexibility is ultra handy if you have extra micro-USB cables lying around and you need to poach that valuable USB-C cable for some other device you’re traveling with. (Note: I have not tested charging batteries in the unit with the micro-USB interface. If I do and I have issues with it, I will come back and update this review.). Also, there are animated LEDs that describe the status of charging each battery, independently of one another. This feedback is nice to be able to see how close you are to a full charge. The batteries that come with this unit feel pretty solid and comparable to Fuji stock batteries. Comparing the battery to the Fuji battery that came with my XT-4, the only notable difference I see on the label of the battery is that the voltage and Watt hours of the batteries are slightly different. (The authentic battery that came with my camera reports 7.2 V, 2200 mAh, and 16 Wh. The sticker on these batteries indicate that the batteries output are 7.4 V, 2200 mAh, and 16 .2 Wh. This would mean that the batteries that come with this charger are nominally higher voltage, though this doesn’t seem to make a difference to my camera.) Like the authentic Fuji batteries, the (2) batteries that come in this package are also Lithium Ion. I have tested these batteries in my camera and so far, they appear to operate identically to the stock Fuji battery of my camera. Overall, I’m very satisfied with this product, and would recommend it to anyone who has an X-T4 or any other type of Fuji camera that uses these batteries.