Kodak RVG 6500 IPS System User's Installation Manual page 71

Important: You can use the RVG sensor to acquire an image while
charging ONLY with the medical charger.
You can use the USB cable to charge RVG battery with the computer.
7
WARNING: NEVER use the RVG sensor to acquire an image while
charging with the USB cable.
Important: Remove the battery from the control box if you will not
use it for a long period of time.
KODAK RVG 6500 System_User & Installation Guide (SM728)_Ed01 67