my DSO Nano v2 worked fine as long as I used it on my desk with usb cable plugged in.
Last week, I used it on battery to measure a knock sensor signal in a car. This worked fine for hours until it run out of battery.
After that I plugged it into the usb port to charge it; the dso nano v2 still worked fine for some time (~30 minutes).
But suddenly the screen has gone dark and my dso nano v2 stopped working with usb cable plugged in.
It boots (display is working fine) if I turn it on without usb cable but goes out after a few seconds (battery is not full although the usb cable was several days plugged in for charging it).
With usb cable plugged in it does not boot at all (the screen only flickers black / white).
Could a faulty battery cause such symptoms? How can I check the battery?
Or should it work with plugged usb cable no matter if the battery is ok?
Thanks in advance