I never charge batteries in any model. I had a brand new 5000mah NiMH pack go up on me last year. Wasn't pretty.
I won't touch LiPos with a ten foot pole and will never use them in a model tank so they're a moot point; the fact that they're in
my fone, laptops and other things doesn't thrill me but I recognize they're a necessary evil...just not in a tank...
jerry