Taking the EVO 4G to the Powermat on Video


Charging gadgets without wires has been a dream for a long time, and it is finally coming into to own with the Powermat Wireless Charging System. The small charging mat couples with a special charging back on the EVO 4G in the video to charge the battery wirelessly. The technology works well, and it’s a testament to how far it’s come that you can walk into Best Buy (s bby) and pick one of these up for $60.

The EVO 4G is one of the thinnest Android (s goog) superphones available, and the key for the Powermat back cover that replaces the original EVO back is that it doesn’t add thickness to the phone once installed. In the video, the entire Powermat system is demonstrated, and it’s clear the folks behind the technology devoted a great deal of attention to detail in order to make it a viable consumer product.

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You might want to change the battery in your smoke detector before making a video next time.


Although I really like my Epic 4g, I really, really miss my Pre’s Touchstone charger. It’s my understanding that HP outfitted all the ‘higher-ups’ at the company with a Pre and a Touchstone charger. It’s also my understanding that WebOS 2.0 allows applications to remain open when the phone is mounted on the charger. I’m thinking desk clock apps, email, Twitter and Facebook, etc… all of them open, right in front of you.
With all this in mind, I’m sure HP will continue using the Touchstone charger with it’s soon to be released WebOS phones.
The Powermat charging system looks interesting, and if it works as well as my Pre’s Touchstone system did, I’ll order it as soon as it becomes available for my Epic.


Does anyone know if these “doors” are compatible with other charger mats?

I don’t like too much the fact that you’ll have to position the device accurately in order for it to charge.
I’ve seen a charger mat that has an automatic searcher inside itself, that positions the induction charger underneath your device, and it had a blue “search” light, moving around the board (or mat if you will). I think I saw it on Engadget, but I forgot the name. It would be awesome if these “doors” could be used with that charger.


I understand that this isn’t meant to be a portable solution, but the downside is you still need to spend money on a cover for each phone you want to use with this. Change phones often, and those back covers become obsolete and expensive!

Being mobility focused, I think a more portable solution that works with ANY smartphone and doesn’t require you to spend money on proprietary add-ons would be a smarter choice:



After the charger turns off, due to full charge, will it comeback on again as the battery starts to drain?


Do you have any insight on how it would work with a case? I was searching for an “iPhone Bumper” style of gel case with an open back. Are you aware of any bumper style gel cases for the EVO. The open back would seem to be compatible with the powermat charger.

James Kendrick

The technology requires the back of the phone to rest directly on the charging mat so no cases will work with this, at least not without removing the phone first.


My curiosity was if the back case made the device too big to fit cases. Granted the case would need to be removed in order to charge.

Also I was looking for something similar to the iPhone 4 bumper case that just wraps around the edge of the iPhone 4. If something similar is available for the EVO the powermat back could make the inductive connection. Unfortunately I could not find anything when I looked around. Just curious if you were aware of a bumper style protector for the EVO.


James Kendrick

Nope, not aware of a bumper case. Note that the little bump at the bottom of the Powermat back will likely make most cases not fit. It extends out slightly from the phone, as seen in the video.


As someone who is incredibly naive on the whole wireless power topic, i would have thought that wireless power would be incredible inefficient when compared to wired power. because the big thing for our generation is green tech i would consider efficiency a big factor. Am i wrong in thinking this?

James Kendrick

Induction charging does lose some of the power in the wireless method, but the technology has improved to make it a viable alternative. I suspect it would take slightly longer to fully charge a phone using this method compared to the wired alternative, but negligibly so.

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