Solar cell phone chargers aren't just greener ... And of course, take a little time to research online product reviews, forum posts or other information from people with the same kind of phone ...

(CNN)-- Peter Gathungu walks more than a mile to a shopping center, where he pays a sizable sum to charge his cell ... mobile phone company, Safaricom Ltd., launched the nation's first solar ...

All products ... chargers are a necessity for how often we use our phones these days. Those need to be charged too, though, and vary wildly in how long they last. The solution? Solar power.

[Michael] took a battery charger meant to be connected to mains power and converted it to work with a solar panel. This was a traditional 4 cell charger ... his Android phone has a fast and ...

Even the angle at which light hits the cell makes a significant difference. In other words, a built-in solar panel would rarely charge a phone at full potential.