Universal Portable LED Flashlight 4x AA Battery USB Power Bank Charger Case Box Battery Charger DIY Kit For Smart Phone From Okaybuying, $4.02 | DHgate.Com
In the test: tizi PowerSnack Powerbank with AA rechargeable batteries / batteries
Amazon.com: POW1 - Emergency USB Battery Powered Power Bank Compact Portable uses 4 AA Ideal for Smartphones, Tablets, Mobile, Apple, iPhone, Android/5055751557704 : Cell Phones & Accessories