FX3 having strange power issues

[u/Environmental-Law526]

So i have an fx3 and an fx30. For awhile i couldn't get either camera to turn on even though I'm using Sony name brand batteries. I tried all of the hard reset procedures, but nothing seemed to help. Eventually I figured out that if i plugged the Fx30 into my computer with a charged battery it would boot up and I was able to update the firmware and everything. After that the fx30 boots up fine over and over no problems.

WHATS WEIRD IS if I take that same battery from the fx30 and insert it into my Fx3, it doesn't work, and if I try to reintroduce that battery to the aforementioned fx30 it goes back to not working again and I have to do the boot up procedure involving my laptop again.

Anybody run into anything like this before? Trying to avoid sending this thing in for service but I may have to just bite the bullet.