Today's mobile phones have larger and thinner screens. And continue to play games, chat, watch movies. As a result, the cell phone battery is not durable. Charging once or twice a day is normal. The most feared thing is that when you watch the movie and play the game halfway, you will lose power while chatting in the video. That's very painful. Therefore, one or several mobile power supplies are now necessary for mobile phone parties.

I have nearly ten mobile power supplies in my own hands for professional reasons. I often evaluate some mobile power supplies myself. Romeos is one of the top brands in the domestic mobile power industry. The quality is also one of the best. I was lucky to get this trial opportunity. It seems that the mobile power used before can be given to friends again.

The packaging of this mobile power supply is OK.

Very environmentally friendly carton packaging.

Close up of mobile power supply

Various parameters on the back of the mobile power supply

Switch and input/output interface of mobile power supply.

Compare the size with Apple 5S, which is only a little larger than Apple 5S. It's very convenient to carry. It doesn't make people feel heavy.

This thickness should be 18650 electric core. If the polymer battery can be made thinner

Detailed close-up of mobile power supply

The two output interfaces can provide 5V/1A and 5V/2.1A current respectively, with good compatibility. In addition, they also support the maximum 5V/2.1A input, saving the charging time.

Mobile power supply full power status indication

One light is on: the power level is 0-25%

Two lights are on: the power level is 25-50%

Three lights are on: the power level is 50-75%

Full bright: power level is 75% - 100%

Here is a suggestion. It would be beautiful if the Romance logo in the middle also had a backlight.

It will feel a lot taller in an instant

Mobile power supply output voltage and current test

Because my phone is almost full. So the charging current is only 0.5A, and the normal condition is about 1A

Change another instrument to test the output voltage and current. The value is the same

Discharge capacity test

The power is almost discharged.

Conclusion: The packaging and power supply workmanship of this Romance mobile power supply are all good. Because there is no professional battery capacity tester on hand. Only high power resistors are used for discharge test. The resulting conversion rate is a bit bad. Find a professional battery capacity tester to test when you have time.

I think this mobile power supply is quite thick. If only it could be made thinner. Add a flashlight function. It's very convenient

The power display is not very user-friendly. If the power is too low, it will be much better to flash a red light to indicate that the power is too low.