Sunvalleytek via Amazon offers the RAVPower 10400mAh Power Bank for $24.99. Coupon code CAUC655C drops your final price down to $16.99 with free Prime shipping. For those of you who are not yet a Prime member, sign up for a free trial or pad your order up to $35 to get free shipping.

With a capacity of 10400mAh, this power bank can provide four to five full iPhone charges. It pushes a max of 3.1A of power across both USB ports. You should have no problem stashing it in your carry-on luggage or even your coat pocket as it’s just 4.4 x 2.8 x 0.8 inches in size. Rated 4.5 out of 5 stars from over 2,600 Amazon reviewers.

Keep in mind that you’ll need to provide the charging cables. I’d recommend stocking up on these Apple-certified MFi Lightning cables for $6.99 with coupon code GS5VLUIG at checkout.

Check out these deals from the weekend if you need even more portable power. ravpower-10400-amazon-coupon-deal

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