Comments on: RCA Airnergy Charger

By: tim s

tim s — Sun, 13 Nov 2011 04:22:17 +0000

i’ve made a similar device in 2002, it uses a basic crystal radio circuit to charge battery. copper windings are used to cause electron flow and capacitor is for increase. diod forces electron direction. basicaly, instead of using a speaker, it’s charging a battery. wire length is voltage and surface area of wire is amperage. tune wire length to wifi freq. and you have a wifi trickle charger. (mine was tuned to the radio freq. earth creates)

By: Alpha162

Alpha162 — Mon, 03 Oct 2011 14:21:57 +0000

This seems heavily suspicious, the average router only puts out around 100 milliwatts (mine is 72mw so this is being optomistic), and remember that wifi is typically broadcasted in an omnidirectional fashion so power drops quickly the futher away you are away from the source. Ergo, you wouldn’t have 100mw’s of wifi power targeting this device like a laser beam, you would only have a small percentage of that.

The circuitry needed to step up any harvested power to charge it’s own internal Li-Ion battery also has it’s efficency losses, even if it ‘did’ work and with a trucklode of wifi access points around you, you would be looking at months if not longer to charge a BlackBerry device up even if it was turned off, in fact, I doubt it could barely keep up with the self-discharge rate of most batteries..

I’ll remain skeptical until proven otherwise

By: Guy

Guy — Fri, 22 Jul 2011 07:11:51 +0000

If you think wifi at starbucks sucks now. wait till everyone there has one of these. the energy doesn’t come from nowhere. there is only so much of it in the wifi signals. each one of these devices cuts the signal strength of the router. given enough of these, you would have to be right up on the router to get a signal

By: Johnson

Johnson — Thu, 23 Dec 2010 00:57:08 +0000

LIES LIES LIES YEAH!

By: prsfan2008

prsfan2008 — Wed, 29 Sep 2010 19:16:39 +0000

“Why can’t this be incorporated into cellphones now?”

It probably can but cell phone companies wouldn’t want that. Think about how much money they make on adapters for charging right now. They’d lose money if they switched to this.

And besides won’t a lot of these in the market hog up so much Wi-fi energy that it will cut down on the signal for the devices that use Wi-Fi?

By: Anonymous

Anonymous — Thu, 22 Jul 2010 10:23:12 +0000

They will charge so slowly that it will be useful only for lower power applications. Such as a mobile phone.

Wiring up 400 for your home is not going to achieve much. Not unless you have 400 wifi hotspots very close to you in which case you should consider moving

By: Agent 86

Agent 86 — Fri, 25 Jun 2010 04:42:03 +0000

I need to rewire my cell charger to accept mini pda for one of these things. Great invention.

By: yeah but

yeah but — Tue, 15 Jun 2010 23:08:28 +0000

re: that guy’s comment,

Yeah, but buying 400 at $40 a pop you’re talking 16 grand to rig up your apartment like that. It’s gonna take a while to recoup that much in energy savings.

By: Mileege

Mileege — Wed, 09 Jun 2010 05:08:34 +0000

“Why can’t this be incorporated into cellphones now?”

Probably because it would make them too bulky, too heavy, and too expensive.

By: Person

Person — Sun, 06 Jun 2010 02:51:50 +0000

Why can’t this be incorporated into cellphones now?

By: that guy

that guy — Sat, 27 Feb 2010 18:00:29 +0000

get an apartment, rig up about 400 of these and rig them up to power your house cuz in an apartment complex there’s always tons of loose wifi signals ripe for harvest