Keeping your batteries charged and ready to go is an obsession for many consumers of personal electronics. The original patented Eclipse Solar Gear product line is designed to trickle charge the batteries of many types and brands of electronics including cell phones, smart phones, hand-held GPS units, and MP3 players with a convenient solar charging solution. Basically anything you can plug into your car using a 12V auto adapter can be trickle charged using solar bags by Eclipse Solar Gear.