If by bounce you mean like a rubber ball bounces:
The bounce, or not is determined by the mechanical properties of the battery, and these doesn't change with the battery being charged or not.
Dead, or fully charged, a battery will behave just the same when dropped.
No, a battery is not necessarily dead if it bounces. The bounce test is not a reliable way to determine if a battery is dead or not. It is best to use a battery tester or multimeter to check the voltage of the battery.
If you mean bounce as like a rubber ball bounces, the answer is no. An AA battery will behave exactly the same if dropped regardless if it's fully charged or completely empty.
No. See link below
Yes
there is no 1998 miata, and once the battery goes dead you pretty much need to replace the battery. It has happened to me before.
Dead Battery was created in 2000.
Alternator is defective, dead cell in the battery, or something is on pulling power from the battery.
dead ball.. no out.
Yes, and it's out-of-bounds.
That's a tough one, but I would guess the answer is "when it stops working". That is a true indication that the battery is dead. But don't call a locksmith, because you can still open your door manually with the key... yes, you can, even if the battery key is dead.
false
dead battery dead alternator dead voltage regulator each needs to be tested.