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Green camping means not every solar backpack products has to sit on your roof. Included with each green camping bag is a batteries pack which stores any surplus power green camping generated so it is available when you need it not just when the sun is up. The green camping batteries pack can also be charged using an AC off-grid charger or car charger(both included). green camping means you do not need to bring different adapters again for different green camping electronic devices if you have one solar Backpack system in the green camping bag. green camping outdoor vacation trail charger hiking vacation hiking off-grid bags batteries mountain