Here’s a bit of an update on interesting eco-tech articles from our green blog Keetsa: US Cellular is offering free battery swap for low battery cellphones , Honda 2010 Insight sold for just $1.24 on an auction site, and Hyundai’s new Accent will run on LPG . Here’s a cool eco-friendly wind-up rabbit , great for gift to your kids. Also check out the new solar ventilation system for Prius . Check out Sprint’s new solar-charging accessories . The solar bike is awesome! Wow, this i