As long as they are within 5% of each other, it should be fine. But with the QX95, the dual charger is actually a series charger that plugs into a balance port for a 2s. Which is why I'm wondering what charger he was using. It should have caught the issue before overcharging. And this also answers another question. Apparently these batteries do not have over volt protection built in. That is a real bummer.
As for the file loaded on here, it didn't work. I do like the LED setup though, but I think it should have red when armed on the inside then solid red at full throttle. So I still need the completely stock dump file. Something was different on this one and I can't put my finger on it. I'm starting to think I got one that was jacked from the beginning. Might have been one that was not meant for the public since it was for review. Just don't know but I will have a better idea when I can get a completely virgin file.