Review: SmallRig NP-FW50 USB-C rechargeable battery

Amazon Affiliate Link: amzn.to/3sKbD5D
Price as reviewed: $35
SMALLRIG NP-FW50 1030mAh Camera Battery for Sony A7S II / A7R II/ZV-E10, USB-C Fast Charging Rechargeable Camera Battery for Sony A7, A7S, A7R, A6400, A6500, A6300, A5000, A5100, A6000, RX10-4330
This NP-FW50 battery worked perfectly in my Sony A6300 camera. The battery percentage remaining indicator worked correctly.
I could charge it using my Sony official wall charger, or via the USB-C port on the battery itself. It draws a maximum of 0.8 amps at 5 volts via the USB-C port, and the package includes a USB-A (rectangle plug) to USB-C cable.
It also includes a small plastic protective cap to cover the terminals for safety when in your bag (which most people will probably not use).
After fully discharging the battery, it took 9 Wh to recharge it via the USB-C port. This is consistent with the 7.4 Wh face-plate capacity of the battery and charging inefficiency / losses.
SmallRig is a brand I've heard of and I've been happy with their other (camera cage) products, so I believe this replacement battery will work well for me.

[@dvd-ws4vz]

Nice Review, got all the info i needed!

[@jeanstevens]

when the power goes out of the battery,, it turns the camera off and crash the file like batmax baterries do? Or works like the original battery and save correctly the file?

[@summetj]

I ran the power down by recording video continuously. It filled up my memory card the first time, so I removed the video and started again. I had a good 15-20 minutes of video recorded on the card when I came back to it after the camera shut down. The file didn't appear to be corrupted, but I don't know if I lost any video at the very end of it or not. The camera is able to read the battery state of charge, so I assume the BMS in the battery will correctly signal the camera to do a safe shutdown procedure instead of just cutting out. [I didn't see anything that would indicate the behavior was otherwise, but I didn't do super careful tests by watching it right at the end of power event....]

[@anrn5303]

is it still working? how long does it usually charge using the USB C vs charger?

[@summetj]

Yes, still working. It takes about 2 hours to charge via the USB-C port, which feels about the same speed as my (normal speed) wall charger, but I haven't timed it.

[@DopeBay]

Does it work if i charge it type c to type c?

[@summetj]

Yes, at the 2-minute mark in the video I tested charging it with a USBC to USBC charger and it properly negotiated USBC power.