"A fully charged Solio will recharge the average phone up to two times, or give you up to 15 hours of MP3 music!" 

Now that's un-do-without-able!!

• Stores power from sun or socket so you can recharge a myriad of your electronic toys and tools
• Compact

        Features Include

• High Capacity internal battery stores energy up to a year
• Adapter Tip System
• Ergonomic design
• Lightweight
• Easy to use 
• One year warranty
• Rated output - 4-12V, 0-1A
• Solar panel output - 155mA @ 6V
• Internal battery6 - Rechargeable 3.6V - 1600mAh Lithium Ion
• Size 4.7" x 1.3" x 2.5"
• Weighs 5.6 ounces
• Temperature range is -4 F to 131 F

Solio Hybrid Classic Charger has compatibility that can't be beat! Compatible with dozens and dozens of products - too numerous to list - see their website