这里点击观看在整个银幕的方式下

这录影证明，能量可以是tranformed入电池，或许证实它是可能的 做一个电池与一个蜡烛石灰或者 土豆.

谢谢 gfcgamer!

Check out augmented reality backpack from Tinmith! This seems almost like a physical layer of Second Life.

Welcome to the new Tinmith backpack 2006. As you can see from the images of our previous systems below, the new version is lighter and more robust than ever! We have taken our eight years of experience in the field and built a system using the best components that are currently available. We have designed our own custom housing to make the system robust and ready for use in outdoor conditions.

The whole system weighs 4 kilograms! Battery packs are an additional weight of approximately 2-4 kg depending on operating time and battery technology used. The profile of the system is almost to the point where a large jacket could be worn over the top and conceal the system. Compare this to the weight of previous systems which was over 12 kg on a hiking frame and with less functionality! The following photos show the left side (with ventilation fan and power switch), and right side (with antennas and helmet connector).

via

Here’s a cool hack for extracting Lithium out of your Lithium battery for those of you scientists who need some Lithium fast!

First you must obtain some dead lithium batteries. This shouldn’t be too hard, as most people will readily give them away when they no longer produce a sufficient current. Fresh ones will work too, but it’s rather wasteful.

Note that this will only work with plain lithium batteries, not lithium ion. The rechargeable lithium ion cells do not contain the pure metal, but rather a lithium salt.

If you happen to be using double batteries like me, you must break them apart. Simply use a pliers and pry off the spot welded conductor. Those with a keen eye might notice how they are connected in parallel rather than series. This is because the lithium cell produces 3 volts, twice that of alkalines.

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Remember our post on lemon powered batteries? This one’s even better,
it uses 2 candles to power a small bulb, pretty powerful.

So next time the light goes out, don’t light your candles, use your candles to power
your flashlight, then when you run out of power, light your candles.

via

Here’s a cool site explaining in detail how to run your Christmas Lights off a battery or by using
a DC-AC converter.

When you use a watt of electricity for an hour, that’s a watt-hour, or Wh. An amp of electricity for an hour is an amp-hour, or Ah. Batteries store such a tiny amount of electricity that they’re usually rated in milliamp-hours instead of amp-hours (mAh). 1800mAh is the same as 1.8Ah.

A typical 50-bulb strand of Christmas lights uses 25 watts. So each bulb uses about half a watt. (Remember that, we’ll use it later.) Now we need to see how much electricity is stored in a battery.

A typical rechargeable AA battery (NiMH) puts out 1.2V and is rated at 1800mAh. Remembering that V x A = W, we see that a single battery has a capacity of 1.2V x 1.8Ah = 2.16Wh. But the lights use 25 watts. So you’d need twelve batteries to power your lights for just one hour. Ouch.

You have four options for getting more runtime out of your batteries:

• Use LED Christmas lights instead, such as those made by ForeverBright. LED’s use 80-90% less electricity than regular lights. So your batteries will last up to ten times longer.
• Use fewer bulbs. Who says you have to use 50 lights? Use only 25 and then your batteries last twice as long. Use even fewer lights and get even more battery time.
• Use more batteries. The more batteries you use, the more total power you’ll have.
• Use higher-capacity batteries. NiMH D-cells store up to 11,000mAh. You could also use a small lead-acid battery or a rechargable pack used for camcorders or remote-controlled toy cars.

You gotta check out the supposedly $50,000 personal helicopter. It is now becoming more and
more practically for people to actually own a personal helicopter. The only thing is, it doesn’t look
like it’s too sturdy for any kind of bad wheather. Well, looks are not everything, maybe it will
perform under pressure.  Hackedgadgets have some more cool pictures…

The AirScooter uses a dual coaxial rotor system that eliminates the need for complicated swash plates and greatly simplifies the aircraft’s controls (unlike a traditional helicopter, the AirScooter II uses motorcycle-style handlebars). The design also eliminates foot controls and the tail rotor. The company reports a maximum speed of 55 knots (approximately 60 mph, in keeping with ultralight regulations) and a 2-hour range from the 5 gallon tank. Power is provided by a 65 HP AeroTwin 4-stroke engine.

For those who like the concept of a coaxial rotorcraft but don’t have $50G to burn, the company also makes the AirScoot R/C coaxial rotor hobby model. The complete radio controlled package with 10 cell battery pack sells for $695.

Air Scooter II Ultralight Recreational Vehicle

Here’s a cool 1.5V battery made from coins that powers an LED!
Great science experiment for kids and techy people like us.
via make

This is great for making your own electrical candles OR for emergencies too!

Combine the 9V battery from your kid’s RC racer and a LED-based candle and you get something that feels at home in a fancy restaurant as well as on your dining room table. Just a design for now, but these 9-volt candle dealies are pretty sweet, and we’d love to get our hands on a few here for Romance Thursdays here at Gizmodo HQ.

via gizmodo