Lead Acid - One of the most commons usage for this type is for laptop computers. It is long lasting durable and rechargeable but unfortunately it is heavy and full of lead cobalt mine P
In case you are using new nickel-metal hydride (NiMH) battery, remember you should not charge the battery for too long or it will overcharge it and end up shortening the life of the battery. However, it is important to charge and discharge the battery three times just like the Lithium mines Ontario-ion battery to ensure that it has a long a life.
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.
Second, Remember not to play media devices like CD player when you are working with a battery. The point is the Lithium battery stocks has to spin the CD. This will drain the battery power quite fast. So to stop the battery from draining fast by entertain yourself when there is power supply.
You have more power to perform work better and faster such as drilling and screwing than the smaller model. Once I used the 18v model I found that I prefer to use it more often because it gives me more power to complete the same task with less effort. At the end of the day it is better and faster, productivity counts.
Cordless Drills are not cheap tools. Amazingly more than half of the cost of the tool goes to a couple of these batteries. This is understandable when you consider what these batteries can do. It is these batteries that have made the tool so highly convenient to use. You can carry it to the job site anywhere without worry about power cords or outlets. That can be a big hassle because the extension cords can easily get in the way or not being long enough.