X-Dragon Direct via Amazon offers the X-Dragon 9,000mAh Solar Portable Battery Pack in Blue, model no. 3364167, Black, model no. 3363564, or Green, model no. 3364506, for $16.99. Coupon code LXN5LCGE cuts it to $11.89. Plus, Prime members receive free shipping. (Non-members can spend $49 or more to qualify for free shipping; otherwise, shipping costs $6.33.) That's $43 off list and the lowest total price we could find. It features dual USB output for charging two devices simultaneously, LED flashlight with three light modes, and rain-proof design.

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