Hello.
So I have charged my dna250 for almost a year using usb was working fine no problems. I decided to charge the batterys with an external charger. When I put the batterys in the mod it did not turn on anymore. I was taking the batterys out and tried to put the batterys in a few more times. I got it turned on a few times now it will not turn on anymore. Was working and then stopped working. Replaced the fuse nothing changed, plugging usb in won’t do anything. Can’t figure out whats wrong with the dna. Sorry for my bad english.