Parkman H1 4000mAh Fast Portable Charger Pack Power Bank for iPhone, iPad, Samsung, Tablets - Black Parkman power bank is designed of Polymer Lithium-Ion battery, top grade Class A battery cells inside. Which has the features of perfect safety and reliability, longer cycle life and less capacity loss. Two USB (2.1A) ports which can be used to charge two devices faster than general 1A output. Safe to use: Supports over-charged, over-discharged, over-voltage, over-current and short circuit protection, perfectly protects your digital devices from charging acciden Slim Power Bank, ultra-slim design with a hard plastic & aluminum alloy construction, solid and portable. Convenient to carry at anytime and anywhere. Compatible with all smartphones, tablets, MP3 players & cameras including: iPhone, iPad, iPod, Samsung, HTC, Sony, Nexus, LG, Microsoft / Nokia, GoPro, Bluetooth Speakers & many more.