yes
recharge it or get a new battery
Leaking from where on the battery, the caps? If so the charging system may be over charging the battery and causing the acid to boil out. Could be a voltage regulator problem.
If you're talking about car batteries ("wet cells") and by "you" you mean "a battery manufacturer", then yes. If you meant "can I do this at home," if you don't already know how, you really have no business messing around with this stuff. It's dangerous for you and the environment.
An alternator is designed to keep a fully charged battery at peak level. It is not designed to charge a dead battery. Installing a new alternator on a car with a dead battery can in some cases ruin the new alternator. Fully charge the dead battery before starting the engine.
buy a new one
Your alternator is dead!
Yes, it is possible for a brand new battery to fail.
You can buy battery acid at a dealer or auto parts store that sells batteries. However, YOU DO NOT WANT TO ADD ACID TO A DISCHARGED BATTERY. You only add acid to a pre-charged battery that has been drained for shipment. If the electrolyte is low, you add distilled water, and let the battery charge. Besides, if you are looking at a battery with a need for electrolyte, it is better to buy a new battery.
check the cables
Check your voltage solenoid. Also make sure nothing is been left on.
Some car battery charges will not charge a completely dead battery. You need to find a type of battery charger that is designed to charge a completely dead battery. You can get around this by hooking a car with a working battery up to the dead battery with jumper cables. The alternator/charging system of the car with the good battery will charge the dead battery. Leave them connected for about 30 min, then disconnect and try to use the battery charger again. If it still won't charge, hook it up to the car with the good battery for a longer period of time.
battery iz dead add it in new battery.