In May, I bought a brand-new 48V20A battery in the auto repair shop, which was cheaper than that in the regular auto parts city. At least 40 yuan and official website also found the serial number of the product. The invoice and the warranty are the same, and there is not much change after use.
As long as it is a new brand of battery, it is generally not fake, and now the batteries have anti-counterfeiting labels, so you can call their company website to check. If it is fake, just give it back to him.
If the landlord wants to save trouble, he will go to a big store to buy it. If you want to be affordable, you might as well buy one in the garage and find the one closest to your residence. If something goes wrong, you can talk to him as soon as possible.