Down to $29.99 from $109 at at 72% discount, this slender little charger packs a wallop of a punch: 18,000mAh of power and the ability to charge two devices at once. Lightweight and delicate, it's the battery world's answer to, erm, Black Widow? A Maserati? A pocket-sized and non-dangerous nuclear power plant? Your smartphone and tablet will just call it Awesome. Charge them both at once from anywhere; this rechargeable battery pack can re-up its own reserves when you reach your destination. The sleek brushed aluminum case comes in the world's sexiest color, which we all know is blue. You're welcome.