Like you, I love external battery packs. I especially like ones that don't require you to plug them into the wall. Okay, ZeroLemon's SolarJuice backup chargers aren't quite there yet—you could easily spend a weekend getting enough power from the sun to recharge your phone once. But boy, there's something about having the option that sure feels awesome. And I live in a part of the country that's not unfamiliar with losing electricity for days due to hurricanes, so there's that.
Right now Newegg is offering a deal on the 20,000mAh solar-powered battery from ZeroLemon. From now until December 12th, you can get the power bank for just $29.99. That's about as much as you would usually spend on a SolarJuice battery with half the capacity and $20 less than what you would currently pay on Amazon.
This battery comes with two USB ports with a total output of 3A. 2.1A provides fast charging for devices that can handle it, and 1A provides slower current for those that don't. Four LED lights let you know how much charge you have remaining, and a flashlight is available in case you do end up using this thing when the power's out. Shipping is estimated at 8-15 days though, so don't order one if you foresee yourself in a situation where you will need it sometime soon.