Poweradd via ebay has 20,000 mAh power bank for $27.99. Seems like a decent price!
- Ultra-high 20000mAh capacity, charges an iPhones 10 times, a large-capacity devices like the iPad Air 2 almost 2 times.
- 2.4A+1.0A output,charge two devices at the same time with the fastest speed and optimized charging efficiency.
- Portable and compact size,a day worth of power that fits easily inside your pocket or handbag on-the-go.
- Input: Micro USB 5V / 2A (Max)
- Output: USB1 5V / 1A; USB2 5V / 2A
- Ultra-Thin and Lightweight Design – Allows for you to easily slide this charger into your pocket and travel with it on-the-go with plenty of capacity for all your devices.
- One year warranty
Support all 5V output devices based USB interface.
- iPhone 6/6 Plus 5C 5S 5 4S 4 3 (Apple charging cable NOT Included, please use the original Cable from Apple.)
- Samsung Galaxy S5 S4 S3 Note 2 3 4, Samsung Galaxy Tab 2 3 4, HTC One / One Mini, Nokia Lumia 925, Huawei G525 Y300, LG Optimus 4X HD I7 I9, LG G3, Sony Xperia, Blackberry, – Motorola, Google Nexus 7 10 – iPad Air 5 4 3 2, iPad mini (please use the original Cable from Apple)
- Acer B1, Google Nexus 7 10, Asus MeMO Pad HD 7 and more