If you are looking for a VW-VBT190 or VW-VBT380 battery for your Panasonic HC-V250k, HC-v550K or HC-V720 then you may be in the same boat i am in. As you may have noticed there are currently no aftermarket batteries for the cameras and the Panasonic batteries are a little pricy. I have tried a few things and explored a few options and I wanted to share a few possible work around for the batteries that you can use till some aftermarket batteries...