You could replace it with a battery with a higher mAh rating and the battery would last longer between charges. Increasing the voltage (V) may lead to better performance, but it could severely damage the electronics. I would highly recommend NOT increasing the voltage. You could get more than twice the lifetime with an NiMh battery instead of an NiCd. You will need an NiMh compatible charger. I would highly recommend NiMh over NiCd.
It's something which could potentially happen, but isn't likely to when hit with airsoft pellets.
It will fall apart over time.
It depends how severly it was overcharged, and what type of battery it is. I overcharged an 8.4v yesterday for about 11 hrs. It still worked fine. But if u overcharge it too much what happens is that it warms up. (An airsoft battery should never become hot enough to feel on the outside). It damages the electric cells inside the battery and could melt the wires. This could easily start a minor fire.
Human Beings will be replaced by robots
The worst thing that could happen is that the police comes armed with guns
nothing will happen
i had this happen once on an 03 dodge minivan. the alternator went bad and the battery was going dead but had enough power to get the engine started. once i replaced the alternator and charged the battery the gauges worked again. good luck!
no
If the capacitor is charged then the battery will explode.
granite
Nothing will happen because the connector plates on the battery aren't touching the prongs on the phone.
If you suck on a battery, nothing will happen, but you will be sucking in bacteria. If you swallow one (which is unlikely to happen to anyone) then you'd probably die.