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Battery Powered Wireless TB Magnetic Door Contact with a 200 metre working range, can be used with the complete range of TB Wireless Receivers. Powered by a single MN21 Battery and very reliable Wireless range of 200 metres (line of sight).
This Wireless Door Chime sounds when door is opened with its Magnetic Sensor Pleasant sounding retail door chime alerts you every time the door is opened Magnetic retail door chime is both energy efficient and economical and is great for stores, offices & more! Powered by 2 x AAA batteries, which will last between 1 - 2 years in normal operation (depending on use), if a low battery situation arises the built in LED will flash red slowly giving ample indication to change the battery. University of British Columbia researchers have invented a safe, efficient technology to wirelessly charge electric vehicles using "remote magnetic gears" a€“ and successfully tested it on campus service vehicles.
Four wireless charging stations have been installed at UBC's Building Operations parking lot and service vehicles retrofitted with the new technology. The team originally conceived the magnetically driven charging system for medical devices such as an implanted pacemaker. Siemens has launched a new electric-vehicle charging station on the market that can fully recharge a battery within one hour.
In the future, motorists will no longer need a cable to recharge the batteries of their electric cars, thanks to a development project for inductive charging, which Siemens presented at Hannover Messe 2011. University of California, Irvine researchers have invented nanowire-based battery material that can be recharged hundreds of thousands of times, moving us closer to a battery that would never require replacement.
The massive shakeup announced by Intel reflects the rapid changes in the tech sector and aims to position the Silicon Valley titan for a post-PC world. A solar-powered airplane on an around-the-world journey had traveled 80 percent of the way from Hawaii to California by Saturday morning. Chinese manufacturers and Internet giants are in hot pursuit of their US counterparts in the race to design driverless cars, but the route to market is still littered with potholes. It can't support very fast charging rates though, because the 10% energy loss in the system presents a heat management problem.

By the time this technology is widely deployed you won't be the driver, the car or big ass truck will park itself as needed in a charging station in between service runs. If you require further details regarding the transaction data, please contact the supplier directly. Whitehead and his team invented a completely different method operating at a frequency 100 times lower and with negligible exposed electric fields.
The larger system, supported by the NSERC Idea to Innovation Grant, was tested at UBC as part of the Campus as a Living Laboratory initiative and provides valuable data for further research and development.
As the batteries get bigger, the charging times get longer Further improvement could be to move the charging device sideways on rails so you don't need the pegs to park the car in the exact right spot. It's simply the government telling the lower classes what they can drive." I agree with your point - although I would not have chosen the term "lower" classes.
But it's not the best (only the short-term cheapest and long term most expensive - which in no reality equates to 'best') The EU is already mandating up to 10% bio-component in all fuels And it's not really working. I like this idea but it is developed as a compromise between practicality, human nature (laziness) and energy transfer efficiency. It annouces someone is there and I am not surprised and I can safely stop what I am doing to pay better attention to my visitors and customers.
Their solution uses "remote magnetic gears" a€“ a rotating base magnet driven by electricity from the grid, and a second located within the car a€“ to eliminate the use of radio waves.
A full charge takes four hours and enables the vehicle to run throughout an eight-hour shift.
It could probably be done automaticly and the charger could swing out of the way once the battery is topped off. Instead what they did was this: have currents in wires move magnets (that's how a motor works) attached to a driveshaft with magnets on the end that move magnets in the vehicle attached to a rotor attached to magnets that are rotated near coils of wire (in the generator) to generate electricity.
I agree that if something isn't broken then don't fix it - but for this we desperately need a fix.

We have a retail space with shop in back and wanted to be able to hear when a customer came in from the shop. The base gear remotely spins the in-car gear, which in turns generates power to charge the battery. Of course we could go for some extreme of efficiency which might not be practical or convenient (or another extreme with the oother two factors dropping out).
I agree that if something isn't broken then don't fix it - but for this we desperately need a fix.Being forever dependent on the goodwill of oil producing countries is also not the best possible course of action. You simply don't need an expensive recharging infrastructure if you can fill up on the way.
Then there is the food for fuel issue - which is starting to be a real problem in third world countries. Having an almost optimal system is better than not having one at all - no matter how perfect it is. A small 1.0 liter diesel car can load up a couple jerry cans of fuel in the back, fill up the tank, and travel 2000 miles on them. The EU is already mandating up to 10% bio-component in all fuels, and PHEVs would reduce the overall fuel demand by 80-90%, which means they're already half-way into making all the necessary fuel from non-petroleum sources. Fuel cells can already utilize liquid hydrocarbons without any particulate or NOx emissions.

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