As an all-in-one performance notebook with gobs of special features, the HP Pavilion DV4-2161NR 14.1-Inch Laptop is hard to beat. This laptop from HP is ideal for users on the go and those who want to work with multimedia files. Beyond that, it's a highly affordable laptop that has something for everyone.

If you have your PC case off you will see something on the motherboard that looks like a small thick silver coin. That is the battery. There are other types of battery used on newer machines (Ni-Cad, NVRAM) but these much less frequently found and so I won't discuss them further.

And charging is lithium stock the best thing about Li-ion batteries there's absolutely no memory effect. And they charge quickly. Battery manufacturers always like to say they've reduced the memory effect, or even 'virtually eliminated' it. But it's never true, you might get away with charging the battery from half full every now and again, but if you keep topping them up then the capacity always goes down. With Li-ion they don't need to reduce the memory effect, there isn't one.

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.

The Lithium battery stocks-ion battery is light years ahead of the earlier batteries and considerably better than the Nickel-cadmium (Ni-Cd) or the nickel-metal hydride (Ni-MH) batteries which are still being used. These batteries are less expensive but the Li-ion batteries are far superior in three ways.

What are you going to be using the drill for? Let's say that you are planning on building some light furniture and maybe will use the drill on weekends mostly. You probably don't need a super powerful drill with the most expensive battery technology. You could probably get by with a 12 volt drill, no need for hammering action, and you could probably do fine with a NiCad battery as opposed to Lithium Ion. Sure, a Lithium mines Ontario Ion battery would be really nice, and would charge faster, but if you aren't planning on using the drill for continuous hours at a time you could save a few bucks in this department.

So how long does it last? Anything from 3 to 9 years if you search this question on Google. Everyone has a different opinion. In my experience about 6 years is the average. It's basically a large watch battery and is constantly supplying a trickle of power to the motherboard. Just like many of my watches the battery can last 2 years or up to 6 years (Fossil watches don't seem to last long for me for some reason). How long was the PC in the warehouse before it was delivered? And, how long was the motherboard in the warehouse before it was installed in the PC?

There are a couple of more considerations about choosing your cell phone battery which we cover with a later post. And don't forget the holidays are coming up so make sure you take a look at various face plates and extra batteries to enhance your gifts!