Get someone to throw one at your head and then tell me they aren't solid..............................
Back of a fag packet calculation would give Kinetic Energy of a 500g battery at 500kts (257 m/s) as 16,500 Joules - still think that won't hurt a Bell blade?
Not as much as you think it would. I'm not denying damage, i'm disputing catastrophic damage. practice your reading comprehension