The best thing about the Sony FS5 is its small, ergonomically balanced design. It’s a lightweight camera that begs to be hand held. So why would you want to screw that up by adding a big battery?
Well, actually, there are some good reasons. I’ve recently discovered the magic of using a Teradek ServPro so clients can follow along during a shoot. And, I almost always use an external monitor. If you’re powering those things independently, you begin to spend a lot of time changing batteries instead of making pictures.
But when I plugged in one of my four v-lock batteries, the camera gave me an error (right):
Hmm. So what the heck? I tried another (also fully charged) battery. Same error. Then I tried a bunch of other more expensive things, like buying a battery plate from Wooden Camera. Same problem! Then I accidentally grabbed a battery that was partially discharged already, and boom! It fired up just fine.
After a little testing, it turns out that you have to discharge your battery for just a couple minutes, for the FS5 to recognize it. Don’t ask me why this is a thing, but it is.
To power your FS5 with an v-mount battery, buy an adapter, and a battery plate. And then, prime your batteries by discharging them for a few minutes by firing up the monitor and other devices, before turning the camera on. Good to go!
A better (albeit more expensive) solution
I purchased a Wooden Camera V-Mount Battery Plate for Sony PXW-FS5/FS7, to see if that would fix the battery priming issue. It costs $195. The first one I purchased didn’t work at all. The helpful staff at Wooden Camera arranged a quick return. After the repair, the unit works flawlessly – without requiring battery priming. But you do have to purchase a Wooden Camera battery slide, for $193.03. So by the time you get done paying the bill, this proper solution adds up to $388.03. The Wooden Camera battery slide is also a pound lighter than the Redrock Micro cheese plate.