... Until you read the fine print below * 1 at the bottom of the box. This value applies to batteries with 3.75 volts. My Galaxy Note 4 invites loud lettering but with 4.4V at 3220 mAh, so has a capacity of 12.4 Wh, the charger only 7.4 Wh! So even at maximum power of the smartphone battery is only about