Sony FS5 Tip: Keep your internal battery in when rocking an external battery

Sony FS5 with Vmount battery and most importantly, its internal battery on deck

Sony FS5 with Vmount battery and most importantly, an internal battery on deck

I got all fancy and started using a v-mount battery with my Sony FS5 recently. I had to jump through some hoops to get it working, but with the help of a Wooden Camera V-Mount Battery Plate for Sony FS5, everything worked as if it were designed by Jesus.  I didn’t even need to put in the camera’s internal battery, and it saved weight to skip it. But this morning, I was shooting this timelapse…

It was a long timelapse, and the v-mount battery died during the shoot. No biggie, right? We know from experience that when an FS5’s internal batteries dies, it saves the clip before it shuts down. But when I opened the SD card on my laptop, woe and behold, I see the clip size is zero KB. Oh Shit.

File sizes of zero bytes are big trouble

Yep, it turns out that Sony FS5 likes having its external power cut when rolling about as much as a DJ likes it when a raver trips over the cord to his mixer.  It’s a train wreck, full stop.

So I thought, hmmm. Wouldn’t it be cool if you could insert the camera’s internal battery, and just have it automatically know, when you plug in that external power, that it should defer to that, while providing instant backup if the power is cut?

So I said like, a little prayer (to Sony engineering), rolled the camera with both batteries in place, put my finger on the vmount eject button, and pressed it. Off came the battery with a clunk, and… the LCD screen dimmed slightly, and… the camera kept right on rolling!

Bless you Sony engineering

In hindsight, it makes perfect sense. So maybe I was the last camera person in the world ignorant enough to make this mistake.  I’m just grateful I was able to learn this lesson on my own dime, rather than at the end of a long client interview.

It’s good to know that, with the camera’s internal battery in place, I can hot swap in and out as many vmount batteries as I like, and all my files will be recorded safely to the SD card.

Did you know to keep your internal battery loaded when powering your FS5 externally? Have you ever experienced a power-related data loss?

 

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