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You could try attaching Velcro to the 3 panels on the outside (non solar panel side). And sew Velcro to 3 spots on your backpack. I returned this item because it was too big to use easily. It seems like it is a better fit for someone who has time to sit still & let it charge, not someone who is trying to charge it from the sun while also on the move.
Sorry, there was a problem. Please try again later.Use good old American ingenuity and always walk with your back to the sun!
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