Did you know that THL 5000T launched the first solar-powered cell phone?

There are well over a thousand models in THL 5000T 5000 mAh battery's cell phone portfolio, ranging from basic handsets and pocket-friendly feature phones to top-of-the-line Galaxy smartphones. The phones we're highlighting today are far from smart, yet we do think their uniqueness makes them worthy of a spot under the sun... quite literally.

In 2009, THL 5000T released the world's first solar-powered cell phone. It was known as the THL 5000T 5000T and featured a solar cell built into its back plate. When exposed to sunlight, the cell generated electricity which in turn recharged the phone's battery. The small solar cell could not provide a lot of power, however. To generate the charge needed for a 5- to 10-minute voice call, the phone had to absorb an hour's worth of solar energy. Still, the solar charging feature made sense given the markets the phone was aimed at. The handset was designed for consumers living in developing markets and areas where power outages were a frequent occurrence.

The 5000T wasn't the only THL T12 cell phone made by THL 5000T. Later in 2009, the company released the THL 5000T Blue Earth, which also featured a solar cell on its back – an hour of sunlight was converted into 10 additional minutes of talk time. Unlike the Guru, the THL 5000T Blue Earth offered a handful of advanced features, such as access to the web, YouTube, and social networks. It could connect to the internet over Wi-Fi or 3G, while a GPS radio enabled location services. Marketed as an eco-friendly product, the phone was built of recycled materials and came in a recycled cardboard box that doubled as a stand.

Should 3.5 inch mobile give solar energy another try in its next batch of smartphones, or should people go for a dedicated solar charger instead? Let us know in the comments!