Well, a socket or a connector for the car charger for conventional USB charger is available almost everywhere nowadays. But only almost. Even during the multi-day hike or boat, or bike with tent-night, it may happen that the battery makes faster limp than one would like. And it literally means "in the woods" is suddenly disoriented and without phone contact.
By Poweradd 7W solar charger can not do it fast, but it will be independently reloaded. The device is foldable and built a protective bag. Because it can be fixed with the attached hook on the backpack, not only recreation, but also for power's you can recharge cell phone during the trek.
Who would like to daytime power and charge your smartphone / Navi night, tinkering with a Poweradd Pilot S 12000mAh 2 USB Super capacity? T Power Bank Portable Charger Stand External Battery with Digital screen f'¹r iPhone 5S 5C 5 4S 4, iPods, iPad 2 3 4 Mini (Apple adapter not included), Samsung Galaxy Note 3 S4 S3 S2 Note 2, Blackberry, HT ... a "storage plant". During the day, the battery takes up the current and feeds at night the phone!
Oh yes: The digital capacity indicator of the pilot S we have determined that under optimal conditions - sun and blue skies, always be tracked orientation toward the sun - can be "produced" 800 mAh / hour of electricity. An average smartphone battery should therefore be charged in approximately three to four hours from completely empty to the brim.
