The difference in capacity, 25W products store more electricity than 15W, so the battery life is longer
The difference between 15W and 25W is that the power is different, that is, the output current is different, and under specific conditions, the charger with large current charges faster. Depends on the 25W charging head and 15W charging line output voltage is how much, 25W charging head and 15W one tow two charging line are input 220V AC voltage,
The difference between the two is that the output current is not the same, and the reason for the different power is that the rechargeable batteries used inside are not the same. For the charging bank with the same output voltage of 5v, the output current of 15w is 3A, and the output current of 25w is 5A, and the maximum charging current allowed by the mobile phone battery for it is 3A and 5A.
15W fast charge provides 3A charging current, the 25W fast charge provides 5A charging current, when the two chargers at the same time to charge 4000mA battery capacity of the mobile phone, the 15W fast charge takes 1 hour and 20 minutes, the 25W fast charge takes 48 minutes charging treasure 15w, is the meaning of flash charge, he charges fast. The power is relatively high.
The difference between 15w and 25w is that the power of the two charging banks is different. 25w charging treasure is more powerful than 15w charging treasure, and in the same time, 25w charging treasure does more work than 15w, charging faster and the effect is better.