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.
The basic rule of getting a replacement battery is that it should have the same voltage as the original. An 18V drill cannot run on a 12V battery. It can only run on a 18V battery. The other thing is that the physical packaging of a battery can be different from company to company. A 12V Ryobi battery may not fit into a 12V Makita cordless drill unless the battery has the right physical dimensions. So make sure the replacement battery looks the same as the old one before you order it. Also, if you are looking for a replacement battery of the same voltage rating and by the same company, know that battery technology is changing rapidly. An 18V lithium-ion battery has a different physical packaging than a NiCad 18V battery.
4) Size: terms like slim, ultra slim, main, and extended are commonly used by different vendors and is normally determined by the battery type and capacity. You can offset this by selecting a battery made from lithium ion stocks ion or lithium polymer since they pack more power in the same amount of space.
When it's time to buy a new lithium ion battery, be sure you're buying one that's new (as in recently produced). Just like fruit has a shelf-life, so do batteries and just like you want to buy fresh produce, you also want to invest in "fresh" lithium ion cells. Check the date-code on the battery or packaging to ensure you're not buying a pack that's been degrading for a year on some shelf.
Obviously, ICE are powered by the gasoline you buy when you fill up at a gas station. The electric motor/generator is powered by a large (and by large, I mean large and heavy) Lithium battery stocks pack. Most hybrids on the road today have large Nickel-Metal Hydride (NiMH) battery packs somewhere near the trunk, or under the seats. (Read about the Lexus Hybrid battery pack).
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?
Using these easy tips to keep the battery in the best condition won't do wonders, but will let you use it to the maximum number of recharges. Ever wondered why some laptops keep their maximum capacity for 3-4 years, while others dive under an hour of runtime in one? This is why.