The product looks good and feels sturdy. It was tested with a 20-cell battery and a fan, and it operated well, with the digital meter displaying 220V. Its durability will be known after some period of use.
The product is exactly as advertised. When working at construction sites, I no longer worry about my phone running out of battery. It's also convenient to charge my laptop and watch YouTube during lunch. I don't worry about power outages like before.
My house is in an area that experiences frequent sudden power outages, so I bought this as a backup. Yesterday, the power was out for nearly 3 hours, and I immediately used it. It successfully powered a standing fan, allowing the children to sleep, and also charged two phones while operating the Wi-Fi modem. It is a very good product.
This device is very convenient for those who often go on outdoor trips or experience frequent power outages. It can be used to power fans, lights, and even laptops. It has a clear display, which gives it a very professional feel. I have no regrets about buying it.
The price is reasonable, and the battery can also be used for electric drills, lasting for a good amount of time. Overall, it is satisfactory.