How do batteries power our world? See more battery pictures. iStockphoto/Thinkstock Imagine a world where everything that used electricity had to be plugged in. Flashlights, hearing aids, cell phones and other portable devices would be tethered to electrical outlets, rendering them awkward and cumbersome. Cars couldn't be started with the simple turn of a key; a strenuous cranking would be required to get the pistons moving. Wires would be strung everywhere, creating a safety hazard and an unsightly mess. Thankfully, batteries provide us with a mobile source of power that makes many modern conveniences possible. While there are many different types of batteries, the basic concept by which they function remains the same. When a device is connected to a battery, a reaction occurs that produces electrical energy. This is known as an electrochemical reaction. Italian physicist Count Alessandro Volta first discovered this process in 1799 when he created a simple battery from metal … [Read more...] about How Batteries Work
The Barnes and Noble Nook eReader is an electronic device that can store over a thousand books. Nooks are a compact, light-weight way to take your books with you wherever you go. One nice feature of the Nook eReader is the ability to loan books you've purchased and stored on your Nook to other Nook owners, and vice versa. The Nook eReader even offers WI-FI and 3G connectivity [source: Gardner]. Although the Nook's battery can be recharged, it may need to be changed or taken out and then put back in from time to time. Follow these instructions to learn how to change the battery on your Nook eReader. Unplug your Nook from the power adapter.Turn off your Nook.Remove the back cover.Place you Nook face down on a flat surface, with its top directed away from you.Locate the screw and tab that hold the battery in place in the back of the Nook. They are at the top of the Nook.Unscrew and remove the screw holding the battery in place. Put down the screw carefully, so it won't get lost.Lift the … [Read more...] about How to Change the Battery of a Barnes and Noble Nook eReader
Start the Countdown Check out these tips for getting the most from your batteries. iStockphoto.com/Les Cunliffe We use a lot of batteries. They don't create carbon emissions when inserted into a walkie-talkie or a digital camera. I'm sure parts of the battery's shipping, production and recycling processes release carbon emissions, but their actual use does not. The greenest part of a battery's life is when they are in your hands, being used for their intended purposes. That means it is your responsibility to keep them alive as long as possible before sending them to the recyclers. Here are some tips. … [Read more...] about 5 Ways to Extend the Life Of Your Household Batteries
Of course you're probably going to need to charge your phone today, but you can extend the battery life significantly if you tweak your settings. You may not need to hit the app store at all. Vijay Kumar/DigitalVision Vectors/Getty Images As smartphones pack ever more features into their svelte bodies, from dual-lens cameras to dozens of gigabytes of storage capacity, they're still hampered by a persistent aggravation — limited battery life. When you're not using them, these batteries last for days, but with any sort of consistent usage, there still isn't a smartphone that will last 24 hours in a standard test, says Consumer Reports. This is why battery-saver apps are still among the most popular apps. But do they really work? It depends. Let's start with one fundamental: Smartphone software varies wildly in quality. Some developers create sleek, efficient apps that perform their tasks without hogging central processing unit (CPU) time or RAM. Other apps are clunky (cough, … [Read more...] about You Don’t Really Need Apps to Save Your Smartphone’s Battery
Battery Pictures Duracell batteries are seen on display at the Arguello Supermarket in San Francisco. See more pictures of batteries. Justin Sullivan/Getty Images Batteries are a common source of power in our present age. We use batteries to start our cars, to power our laptops, to allow us to talk on our cell phones for hours and even to propel some of our electric vehicles for miles and miles on a single charge. They can range from sizes smaller than a pencil eraser to as large as 2,000 square meters (21,528 square feet). The largest battery in the world has the capacity to power the entire town of Fairbanks, Alaska, a city of about 12,000 people, for up to seven minutes in an emergency situation [source: Conway]. Some of the first primitive types of batteries can be traced all the way back to the Parthians around 250 B.C. when the they lived in the area of modern day Baghdad [source: Buchmann]. The Parthians made a clay jar, filled it with vinegar, then put a copper cylinder … [Read more...] about When was the first battery invented?