From EcoBoost, their Waterproof Emergency Charger Battery Pack for Micro-USB Devices, 1500mAh Black version.

Features:
- IP67 certified dustproof and waterproof protected.
- Small and lightweight, easy to store and transport.
- Replaceable CR123 battery for emergency charging, regular li-ion battery for regular charging.
Model Number: GDI-EXBMR151