Chuwi CWI509 original battery capacity

Hello everyone, I found the Chuwi CWI509 laptop battery on AliExpress. The part number and capacity are HW-31130148 4000mAh 30.4WH. I want to ask if this is the original battery capacity?

The larger the battery capacity, the longer the battery life, as long as the battery is compatible with your laptop, it can actually be used.