Indeed, because they do work quite well. I have a CD case sized panel and I charge my phone with it in normal daylight. It pumps out about 500ma in bright sun so takes about 2 hours to charge my G1. For better utility these are cool too <a href="http://cgi.ebay.co.uk/Solar-Power-Battery-Charger-for-iPod-Nano-iPhone-3G-NEW_W0QQitemZ170432618968QQcmdZViewItemQQptZUK_Gadgets?hash=item27ae9361d8" rel="nofollow">http://cgi.ebay.co.uk/Solar-Power-Battery-Charger-for-iPod-N...</a>