I have owned a EZB v3 for 4years and it worked fine.
I just received a brand new EZBv4 controller and camera yesterday. I bought fresh rechargeable batteries and powered it up. Did the startup speech, networked it with my windows computer, tried my android phone and my win10 tablet. It connects "DING!" and then disconnects in a second. Funny thing is the Camera stays connected to the EZB software on the computer. it lasts longer on the Android app, but no servo moves, no sound plays,,,
I'm hoping this is something very simple :)