WiFi手机充电器，行吗？

老郭

看到一则新闻，说CES上展出一种可以利用WiFi信号为电池进行充电的东西。WiFi信号能量密度那么小，还不如阴天的阳光呢，这东西行吗？

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2010-01-13  来源:驱动之家  

智能手机爱好者总是嫌自己的手机电池续航能力不足，往往在出门的时候带上备用电池，也有一些厂商推出了利用太阳能等技术的随身电源，近日一款名为Airnergy Charger的新型充电器产品在CES2010亮相，它的神奇之处是可以利用WiFi信号为电池进行充电。

虽然无线路由器的功率不是很高，发射出的WiFi信号辐射能量也很小，但是Airnergy却拥有足够高的转换效率将微弱无线信号携带的能量变为电能，在CES展会中这款充电器在90分钟内利用无线信号为一块黑莓手机电池充入了30%的电量。

充电器内置有一个蓄电池，用户可以随身携带该产品，只要在有WiFi信号覆盖的地方就能为手机充电，与太阳能充电技术相比，Airnergy Charger不受天气环境影响。该产品的生产商RCA表示，他们将在今年夏季推出售价为40美元的USB充电器，WiFi充电器随后上市。

我爱电路图

技术是会不断提高的，至少可以实现无线充电了，笔记本可以不用插线了，更加灵活和便携。

chunyang

这个消息不可信到扯蛋的地步！估计又是白痴妓者的高作。手机电池就算600mAh吧，黑莓定位商务手机，至少多数型号的电池容量肯定比这个大，算小值，那么30％的容量也有差不多200mAh，90分钟充入，需要的充电电流在100mA以上，而这个充电电流数值折合成功率在0.5W左右（按单节4.2V锂电池计），可Wifi的发射功率远不到这个数值，高明的妓者是在报道永动机。

老郭

这回可是老外报道的，许多媒体都报了，包括Computerworld

Power harvester uses Wi-Fi to charge wireless devices

Computerworld -  RCA showed a prototype of its Wi-Fi Hotspot Power Harvester called Airnergy that's designed to convert Wi-Fi radio signals into DC power for charging small wireless devices such as smartphones.

The small device called the Airnergy, is about 2 in. by 3 in. in size and is expected to sell for $39 to $49 this summer. RCA is working on a smaller version that would take the place of a battery inside a handheld device and would sell for around $59. That smaller version might ship in 2011, according to a demonstration at the 2010 International CES recorded on video by Geeky-Gadgets.com.



RCA officials could not be reached to confirm the details. According to a spokesman in the video demonstration, the device was able to charge a BlackBerry Bold with about 30% power in 90 minutes using a nearby Wi-Fi access point. The amount of charging time depends on a user's proximity to the Wi-Fi hot spot.

Demonstrations of wireless chargers have been a staple of CES for several years, and some products promised in 2008 have not materialized.

Some products, such as the Dell Latitude Z laptop, allow charging by placing the laptop directly on a wireless charging stand.

And Fulton Innovation LLC showed products and prototypes at CES. One Fulton technology concept powers a 12-watt light bulb from a transmitter placed 35 inches away.

Wireless charging could prove popular. Powermat USA showed new wireless charging mats for handheld computers at prices ranging from $39 to $149, and the company's CEO said Powermat has sold 750,000 devices since the company launched in the U.S. two months ago.

One blogger questioned why a charger would be needed, since a person within a hot spot might also be close enough to plug a device into a power outlet to recharge it. The usefulness of the device would depend partly on how close a user must be to the Wi-Fi access point, and whether a power outlet is available.

Matt Hamblen covers mobile and wireless, smartphones and other handhelds, and wireless networking for Computerworld.

老郭

我看这米国记者也玄。

1. RCA officials could not be reached to confirm the details. 找不到人也敢报；

2. The amount of charging time depends on a user's proximity to the Wi-Fi hot spot. 你要是贴到access point肯定充得快，可是别人就完全没信号了，能量都被你吸走了

chunyang

白痴妓者哪都有，国外还有叫兽到处招摇说早有人研发出核聚变发电机甚至什么真空零点能发动机（估计是看了科幻剧Stargate当真了）什么的，因各国政府的共同“阴谋”隐而不发……

sz_kd

电烙铁

哈哈，老郭也中照啦，其实哪里都有片子的，外国人也并非个个都是好人。只不过他们的片子相对少一点吧，哈哈。  

f.luo

向chunyang大师学习如何分辨骗子。

weiiew_00

100年前各位能相信会有手机吗?

xubin_hh

学习ing。。。

pros

hehaa

qdqc

估计是用里面充电电池充电的时间

8051

为了下载个东西，被迫回复。唉。。。。。。

ongg

学习中

zls261976514

淡定！！

zx3113847

呵呵 都是些没脑子的记者

SITUMOJIE

专业·pcb打样2697371851

Hugo801122

好老了啊。