I've had a few bad batteries. DJI batteries are a little special since they have all of the electronics and conditioning circuits etc onboard, rather than in the charger. Makes things easier for usage, but also means that when something does go wrong, the entire battery is no good.
Just get DJI to replace the bad battery and you'll be fine; it'll take about 2 weeks including shipping etc - but totally worth it. Not sure where you bought it; maybe you can return it to the place of purchase quicker?
But yes absolutely - you can charge a regular battery on the hi-cap charger, and vice versa. I do it all the time.
I actually have a 3rd party charger that I adore - it supports 4 batteries at once... or, in my case, 3
P4P High-capacity batteries, plus the Mavic's advanced charging hub so I can charge all 4 Mavic batteries at the same time. Oh, and the
P4P's remote as well. Quite worth the $79 investment![/Q
Is it the Thor