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February 18, 2009 2:00 AM PST

ZTE debuts solar-powered phone

by Kent German

The Coral-200-Solar gets its power from above.

(Credit: ZTE)

Samsung wasn't the only company showing a solar-powered cell phone at the GSMA World Congress. On Wednesday, Chinese manufacturer ZTE launched a green model of its own.

Created with Digicel and Intivation, the Coral-200-Solar is designed for emerging markets where electricity may not be readily available. And, of course, it's Earth-friendly.

Exact feature details are sketchy at this point, but from what we can tell, the phone won't offer a lot of goodies. Considering its target markets, the Coral-200-Solar is really about making calls. It should be available in June.

Text and dial with the ZTE D92.

(Credit: Kent German/CNET Networks)

The candy bar design is pretty plain and not nearly as appealing as the Samsung Blue Earth. On the front, there's a display, a functional navigation array, and a keypad. Except for the solar panels on its rear face, the Coral-200-Solar largely resembles the ZTE C78 that's currently with MetroPCS. On a side note, a C78 is on my desk back in San Francisco awaiting a full review.

Unfortunately, hands-on time with the Coral-200-Solar was difficult. Apparently, the phone is as scarce in Barcelona as the Blue Earth.

When we wandered around the ZTE's booth the day before the announcement, it was nowhere to be seen, yet we did spy the aforementioned C78 and the interesting ZTE D92 slip phone, which features a Fastap keypad that combines a full alphabetic keyboard and a standard numeric keypad. The D92 also offers Bluetooth, 3G, and a 1.3-megapixel camera.

Kent German is a senior editor for cell phone reviews at CNET. When he's not testing the newest handsets on the market, he's blogging about cell phone news for Crave. In his On Call column, he answers reader questions and gives his take on the rapidly changing mobile industry. E-mail Kent.
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by ausernamenoonehaschosen February 18, 2009 6:22 AM PST
Considering how large the solar panel is, it would take days in direct sunlight to recharge a normal cell phone battery. For example, I had two 1.5 x 1 foot solar panels hooked in parallel through a 5 V regulator to my old RAZR, and it charged less than a quarter of the battery meter after sitting in direct sunlight for about 5 - 6 hours. Now consider how large this array is. It's a gimmick. Although the other specs of the phone are rather nice.
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by mike_ekim February 18, 2009 7:34 AM PST
Agreed. A large color LCD screen just doesn't make sense with this phone, either.
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by February 18, 2009 8:00 AM PST
If the phone is left in sunlight all day with the solar panel up, will it be enough to keep the phone changed given normal usage?
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by ausernamenoonehaschosen February 18, 2009 11:14 AM PST
Definitely not. The typical current required for a phone is around 50 - 100 mA during use, depending on the electronics, screen size, etc. My 1.5 x 1 foot panel delivers at peak 115 mA. Therefore, considering how small this thing is, I don't see how it's possible it could deliver enough current to keep the phone at neutral charge during use. This thing is about the size of the solar panel on my flash light radiio, and it can't get enough sunlight to keep the radio going when the battery is dead. A radio uses much less current than a cell phone, btw.
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