Don't let your battery fully discharge. If you let your battery die frequently, you are putting extra strain on the battery. Most companies recommend discharging the battery once in cobalt mine every charges or so.
Nonetheless, the Volt is not something in GM's immediate plans. The idea for the Volt would require that a cost efficient 400-lb Lithium mines Ontario-ion battery be found. Lithium-ion batteries of this size are not currently available. Further advances in battery technology would be required to allow GM to consider making the Volt a production car. These are enhancements that could occur in as little as a year, or as many as 20 years. GM has stated that they feel the technology is almost there, yet a vehicle like this is probably about a decade away.
On top of this wireless fun your iPad comes with Bluetooth 2.1 + EDR (ahh yes, rubs of chin all round, what the heck is all this stuff anyway?) the upshot of which is that you can connect it to accessories like wireless headsets, headphones or the Apple Wireless Keyboard if that happens to particularly float your boat.
It is good to know that even when your cordless drill is turned off, it would still draw a little energy form the batteries. This may not be a significant amount but when you add that over a period of time, you will be losing a lot of Lithium battery stocks power this way. Therefore, do not store your cordless drill with the battery intact. Remove it and put it aside.
The next thing you can worry about is the power of the gun; the FPS. Your AEG's FPS is primarily determined by the strength of the spring. Most springs are recorded in meters. So the m100 spring for example is 100 meters per second (328 feet per second). The stronger the spring, the more power your gun will pack. Always remember when upgrading the FPS to make sure the other parts of the gun and gearbox can handle a stronger spring.
So, it's easy to see how a lithium 18650 battery, and Li-ion cells in general, have found there way into the homes (and hands) of many modern consumers.