From Ascent Solar, their EnerPlex Jumper Mini Series Portable Charger for Micro-USB devices, the 2600mAh Gray version.

Features:
- Intelligent Charging: provides 70-100% more battery life for most smartphones.
- It's tethered Micro-USB output makes it simple to hook up to a smartphone, GPS, or camera.
- Input: DC 5V - 1.0A
- Output: Micro-USB: DC 5V - 1.0A (1.0A Max)