No, it ultimately does not matter if you let a lithium battery run down to null. It can be re-charged either completely run down or with some power still on it. The preference is for it in fact to not be completely discharged.
There is no only one way to charge it and that is with a battery charger. A 15 amp battery charger will charge it about as fast as it needs to be charged.
Depending on size and voltage output, higher than battery maximum output at an ampere rate that wont "cook" the battery. For example: a car battery placed on a 40 amp charge rate for 12 hours in most cases will "cook" the battery. But placing it on a 2 amp charge rate will fully charge it over the same time interval.
The lithium Polymer (LIPO) battery is a more advanced then the Lithium Ion (Li-ion) battery. The LIPO has it's electrolyte held in a solid polymer film which is directly bonded to the lithium electrode. A LIPO holds more charge but it's lifespan is less then a Li-ion. Some people think the LIPO is easier to recycle but they are both basically recycled the same way. All in all the LIPO is slowly replacing the Li-ion.
No, It is not recommended to charge the laptop battery yourself. Laptop batteries require specific charging circuits and power sources. Attempting to charge it manually can be dangerous and may damage the battery or the laptop. Always use the manufacturer's recommended charger and follow their instructions for proper charging.
is there another way to charge a blackberry 9500 battery because my fone wont charge
There is a battery inside of it, and he only way to charge your camera is to charge the battery with a battery charger that plugs into the wall...look on google, you'll know how.
The same way you charge any battery, by hooking it up to an appropriate charger.
The same way you charge a car battery. The only difference in them is that the marine battery is a deep cycle battery, meaning it is designed to be run completely down without damaging the battery. Ideally you need a charger designed to charge deep cycle batteries but you can charge one with a normal battery charger.
Do not let the battery run down until dead. This shortens the life of the battery, especially car batteries. Some lithium batteries, such as for laptop PCs, this is actually good for the battery, but that's the exception.For a vehicle, boat or motorcycle, keeping the battery charged on a trickle charger to maintain 100% charge is the best way to extend the life.
No
There is no safe way to charge ANY battery without a charger rated for that particular battery. You could easily destroy the battery if you try.
It is best to store a Lithium Ion better with a full or partial charge. If not used at all it is good to recharge it after a few months.