The trend with external batteries is to make them smaller and more portable while packing in as much capacity as possible. The new second generation Anker Pro2 doesn't so much eschew that trend as it takes the capacity thing way to the extreme. This external battery has a whopping 20,000mAh capacity, which obviously impacts the size. Still, it's somewhat slim for having so much juice. Should you make the room?
Update 1/27/14 12:17pm PT: New code Y8WGAYUM (via SD) should work today for the same $4 off.
Another device, another charger. That's the way the story goes. I personally leave a USB charger hanging from at least one outlet near every resting place in my apartment, but if you happen to need all of your devices in roughly the same place, my system won't exactly meet your needs.
You don't need to have one of those super hefty extended battery phones to burn through juice with wanton disregard for the future. All you need is a big honking external battery, and we found just the thing on sale today. The Anker Astro E4 is a 13,000mAh rechargeable cell that is usually only $44. That's a good deal, but for the next few days, it's down to $36.99.
The Anker Astro E4 weighs under 11oz and can charge most smartphones 5-6 times without needing to juice up itself.