Anker’s Astro E4 Portable Battery Pack is currently being offered at just $39.99 shipped, originally priced at $119.99. Holding enough power to charge most smartphones 7-8 times, keep your gadgets going for days and still have juice left to share. Product page. Continue reading for a video review.

Notable features:

  • Huge capacity (13000mAh) delivers 6+ charges to most smartphones or an 80% charge to an iPad 3 / 4.
  • Super-fast charge output (5V / 3A total) through dual USB ports (5V / 2A and 5V / 1A) allow for simultaneous charging of your iPad, iPhone, Android, and more at high speed.
  • Smooth, ebony varnish allows you to power up in style, while 4 status LEDs keep you informed of remaining capacity.
  • Built-in flashlight for dark or low-light environments.
  • Premium lithium-ion battery ensures quality, supplying 500+ recharge cycles over a lifetime.

[via Amazon]