Usually it has been seen that people who use laptops actually plug the laptop to the power supply. However this edison battery is the wrong way of charging the battery. You should charge a battery once or twice a month. The battery should be charge fully at least 30 minutes before you start using it. In case you are going to use direct power supply, then it is best to remove the battery. This will ensure two things -- first, the battery since it is charged already will not discharge uselessly and second, it will ensure that the battery life is extended.
It isn't always possible to be near an outlet to keep a charger running. A laptop is supposed to be portable. But a user may still need to be on their computer lithium facts more than just or hours their batteries allow them. That can turn into a real problem if the person can't keep their computer running because its battery just died.
ONickel Metal Hydride (NiMh) - Popular battery about 1-2 years ago. They are lighter than Nickel Cadmium batteries, but heavier than Lithium batteries. These should be cycled once in a while for optimum performance.
Step 2 - Turn off your iPod and set the hold button to the on position. Take a flathead screwdriver, as thin as possible but oftentimes the retail store that sends you the battery will give you a tool. In any case you must open up the unit by lithium bettery stock putting the tool or screwdriver between the plastic and the metal. Once you sense a clip, pry it ever so gently. Continue around the iPod, opening each latch.
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.
For jobs where the batteries are required to be light weight as well as being reusable, then lithium batteries are ideal. But if a battery is needed to be very reliable or to remain unused for a long time then they might not be the right batteries for it.