ONICD Batteries These are the oldest type of cobalt properties cell phone battery and as is the case with the laptop computer are less reliable than the newer types.
On top of this wireless fun your iPad comes with Bluetooth EDR ahh yes rubs of chin all round what the heck is all this stuff anyway the upshot of which lithium facts 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.
Laptop computer uses: If you keep the battery in your laptop for everyday use, and power it from the wall socket, unplug the power every few days and let it run off the battery, as a battery at 40% capacity lasts longer than one at 100% capacity. if you don't travel with it, you should remove the laptop battery when on fixed power.
Avoid using replacement that has been on lithium bettery stock for a while. During storage the battery can lose much of its capacity through internal resistance, which damages it and lowers the maximum capacity.
As mentioned earlier, there are different types of batteries. You can choose a lithium ion battery if your primary source is electric power supply, but you do switch from fixed power to a battery on a regular basis. A Nickel based battery is preferable if you use a battery as your primary source.
Battery chargers for mobile phones are notable in that they come in a wide variety of connector-styles and voltages, most of which are not compatible with other manufactures' phones or even different models of phones from a single manufacturer.