Do Rechargeable Lithium-Ion AA Batteries Exist?

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Do rechargeable lithium-ion batteries exist in standard sizes like AA, AAA, C or D? Yes, they are finally available. A company called Kentli has released AA and AAA rechargeable lithium polymer batteries that output 1.5 volts. Kentli batteries are available on Amazon here. Lithium-ion batteries normally operate 3.7V per cell — but Kentli put circuitry inside the cells to reduce the voltage …

How To Filter Your Shower Water Very Efficiently

This post has been updated for 2011. I recently wrote about Filtering Your Drinking Water Very Efficiently, but let us turn now to your shower water. When we shower, we absorb the substances dissolved in water through our skin quite readily. For example, 60% of the chlorine absorbed daily comes from showering in chlorinated water. The chlorine is absorbed directly …

The Most Efficient Chest Freezers

When researching energy efficient appliances, we often turn to the recommendations of the American Council for an Energy-Efficient Economy (ACEEE). The ACEEE continues to publish helpful information about all sorts of appliances, including freezers. The ninth edition of their Consumer Guide to Home Energy Savings, published in fall 2007, contains helpful information about selecting a freezer. The most efficient type …

The Best Reverse Osmosis Water Filters 2010

Reverse osmosis for the home is a water purifying method in which tap water is forced through a semi-permeable membrane that prevents bacteria and minerals from passing through to produce a more pure form of drinking water. The choice of a water filtration system depends on if you’re looking to rid of a specific contaminant or if you’re generally looking …

New World Record Set For Solar Efficiency: 31.25%

On a perfect New Mexico winter day — with the sky almost 10 percent brighter than usual — Sandia National Laboratories and Stirling Energy Systems (SES) set a new solar-to-grid system conversion efficiency record by achieving a 31.25 percent net efficiency rate. The old 1984 record of 29.4 percent was toppled Jan. 31 on SES’s “Serial #3” solar dish Stirling …

The Tallest Wind Turbines In The U.S. Installed In Texas

The tallest wind turbines in the U.S. have been installed in Texas — the Vestas V90 turbines are 345 feet high, and are rated at 3 megawatts each. They are part of the 63 megawatt Snyder Wind Project, a wind farm that’s just been installed in western Texas.

New Nike “Considered” Models

Nike has released four new “Considered” sneakers. This is good news, because the first round of sneakers were fairly unattractive. Nike produces these shoes using sustainable manufacturing practices (more details here). However, Nike has a history of maintaining questionable working conditions in its oversesas factories. More information on this issue can be found on the Responsible Shopper website. You can …

Best Waterproof Headphones For 2011

Ever since we saw Michael Phelps with his headphones at the Olympics not only have we asked the question, “What’s on Michael Phelps’ iPod?”, but more importantly, “How can we too enjoy music in and around the water?”.  With science continuing to advance in developing underwater headphones, water lovers can now bring their tunes with them and still get quality …

New 12 Watt LED Closely Matches 60 Watt Incandescent

The AmbientLED from Philips is the latest LED light designed to replace the 60 watt bulbs in people’s homes. Unlike older LEDs I tested, this light is definitely up to that job. It gives off 800 lumens of warm light, while running on 12 watts. It’s the first LED light to earn an ENERGY STAR qualification. To qualify, a 60-watt …

Best Manual Juicers

Manual juicers are handy to have in the kitchen &#8212 they don’t require electricity and are relatively inexpensive. They can juice a surprisingly large variety of fruits and vegetables. Best of all, they are usually easier to clean than their electric counterparts. Many people use manual juicers to squeeze wheatgrass into a nutritious drink. Most reviewers seem to recommend Z-Star …