Today, Omaker has a great sale going on, on Amazon for their 10,000mAh battery pack. It's typically $29.99 - which is a great deal right there - but now it's even cheaper. It's also got two 2.1amp ports, which is amazing. And more, you can see all that stuff down below.
Intelligent technology:maximizes compatibility with Android,Apple or other devices by enabling charge speeds of up to 2.1 amp with 2x 2.1A USB Outputs. High capacity: 10000mAh,10000 mAh of capacity charges an iPhones four+ times or large-capacity phones like the Galaxy S4 more than twice, 4 Integrated LED indicator show Power status. Battery Type:Constructed with A+ Li-Polymer battery cells and build-in microchips to ensure safety use; 500+recharge cycles over the life of the battery. Intelligent power manage IC:Multiple protection system inside for safety;Designed for avoiding overcharge,overvoltage, overcurrent, and short circuit, CE, FCC, ROHS certification ensures reliability.Portable Charger: Compact design, Super portable, Suitable for a wide range of occasions, such as parties, BBQs, and outdoor activities like camping,mountain climbing, and picnics. No fingerprint leave,smoother surface,no smudge finish is much nicer than gloss finish.