Join more than 30 million satisfied customers with the Anker Plus. Anker is charging. THE NEED FOR SPEED The latest chipset guarantees 10W charging for Samsung Galaxy devices and 7.5W charging for iPhones, which is 10% quicker than similar chargers. Just use a Quick Charge power supply (9V/2A) for optimal performance. LED Indicator: This handy LED indicator lets you know when the battery is charging. Please ensure that nothing is in the way of your smartphone's charging surface if the light turns blue. Please try a different charging cable or a 5V/2A power source if the light turns green. Case-Friendly: Protective cases up to 5 mm thick make charging the PowerWave simple. Credit cards and metal accessories may restrict the charging process.