As someone who relies on my Sony A6400 for both photography and videography, the Gonine AC-PW20 power supply has been a game-changer. No more mid-shoot battery swaps – this little gadget keeps my camera powered indefinitely.

The dummy battery fits snugly into my A6400, and I love that it works across multiple Sony models. The 6-foot cable gives me plenty of room to move around my studio setup without feeling tethered.

During a recent 8-hour livestream, the Gonine performed flawlessly. My camera maintained steady power without any overheating issues – something I can't say about using regular batteries during long sessions.

The build quality is decent overall, though I agree with other reviewers that the dummy battery itself feels a bit flimsy. After three months of use, mine still works perfectly but I'm careful not to bend it too much when inserting/removing.

One unexpected benefit? The power brick stays remarkably cool compared to some other adapters I've tried. The included carrying pouch is a nice touch for storage and transport.

If you do any studio work, streaming, or long recording sessions with compatible Sony cameras, this $30 investment will pay for itself in saved battery costs within months. Just remember to fully insert the dummy battery and properly close your camera's battery door!