I just had to post about this one. Ronen from BerryReview pointed out a free app now being offered in BlackBerry World called Solar Battery Charger. If you are one to actually read app descriptions, you'll quickly find out that it's a gimmick app designed to fool those who don't read past a few lines. Or, you can also fool your unsuspecting friends. It functions very much like the notorious solar powered flashlight that works only in direct sunlight... ?!?!
In all seriousness though, the app uses the light sensor on the device to detect the current level of light. Then it applies the level of light intensity to charging levels in the UI gauges.
What's funniest about this app, is reading some of the reviews. Apparently there are some disappointed users who truly thought this app works! Lesson to learn: read the description! Those duped should at least be glad it's a free app.