Rechargeable batteries are used in a variety of devices. There
are several different types of batteries that use different
technologies for different types of devices. Three main types of
rechargeable
batteries are 9 Volt, D, or AA and also AAA. But what to
these letters mean and why are they different?
A 9Volt battery is a rectangular battery used in small consumer
electronics. Rectangular is a shape used for most batteries
which are 4 volt or higher, up to 12 volt. All batteries are
made of cells, but the cells in a 9 volt are connected in a
series combination which makes the voltage rating of the battery
the sum of the voltage of the cells.
D is another type of available rechargeable battery. It is
cylindrical and 1.5Volt. D batteries are referred to as
batteries, even though they are really just a D cell. As opposed
to the 9 volt which is several cells connected, the D cell is
simply one type of cell. D cells are used for a variety of
electronic devices.
AA or AAA batteries are typically composed of alkaline. However,
NiCd and NiMH are now available for rechargeable types and have
higher capacity than alkaline. AA and AAA are used in handheld
devices like remotes, digital cameras, model cars. AA and AAA
hold the same amount of power, but AA has more lifetime, which
is why it is larger.
All rechargeable batteries are referred to as secondary cells
because they can be charged after they are drained. 9 volt, D,
AA and AAA are all dry cell type batteries because they do not
contain the wet lead acid as in the oldest type of rechargeable
batteries. Buying quality batteries and charging them properly
is the best way to get the most out of your money.
Did you get the MP3 players that you wanted for the holidays? Are you searching for a new model? There are hundreds of them on the market ranging from the highly loved IPods to the $20 discount department store models. Which do you choose and what will they offer you? With so many options out there, it is easy to see just what you need in a few tips. Here are some to help you to purchase the best MP3 players from now on.
* What storage do you need or want? The size of the memory on the MP3 player has a lot to do with how many songs you plan to download to it. The more memory, the more songs you’ll have. You’ll need to choose between the flash memory players (which are able to offer a few hours of music), expandable memory players (which you can add more memory to later on) and hard drive players (for a huge amount of file storage.) * What features are a must have? For each person there is a different need in features. Some want all of them while others just want the basics. Some features to consider include color screens with image display so that you can view photos, video capability which allows you to see movies and TV shows on your MP3 players, sports features that will do such things as monitor your running, entertainment features that will let you play games on your player as well. Still others will remind you when you need to do things, allow you to tune into the radio and others will allow you to use voice recording features too. * Now, let’s look at accessories. There are many accessories you can pack onto your MP3 players. They can be such things as music services where you can purchase and download your songs from or cables that allow you to transfer files faster and easier. You can also check out headphones that are just the right fit. You can choose a radio transmitter which allows you to play your music through the radio in your car, cassette adapters, docks, stereo connector…there are many options to choose from.
So, now that you know what to look for in the MP3 players that you can purchase you’ll just need to make up your mind. That may actually be the hard part.