The Anker Advantage: Join the 10 million+ powered by our leading technology , Ultra-High Capacity: Upgraded from the Power Core 16000, it charges the iPhone 6 seven times, the Galaxy S6 five times or the iPad mini twice. Recharges in 10 hours with a 2 amp charger, phone chargers (generally 1 amp) may take up to 20 hours ,Fast Charging Technology: PowerIQ and Voltage Boost combine to deliver the fastest possible charge up to 2.4 amps per port or 4.8 amps overall. Input: 5V / 2A