The battery of the battery train from China is not as good as that of other equipment. When replacing the battery of the battery train from China, you must contact the manufacturer of the train and use the brand they specify, or the battery provided by the manufacturer, because the battery is the core of the battery train from China. It is also one of its important parts.
First check to see if the battery needs replacing.
Check the appearance of the battery for deformation, cracks, scratches and liquid leakage. The battery terminal of the battery train from China should be clean, free from rust, the signs should be clear, and it will not run far when fully charged, all of which are signs that the battery needs to be replaced!
Second, choose the brand of the battery.

To choose a brand battery: The battery of the battery train from China is generally provided by a professional battery manufacturer. The quality of batteries produced by different brands and different manufacturers is different, and the price is also high or low. Well-known and large enterprises have large scale, strong technology, good service, and guaranteed battery quality and after-sales service.
Then check when you need to replace the battery.
Check the manufacturer, product specification, date of manufacture, and trademark of the battery train from China; check whether the internal and external signs are consistent, especially check whether the product has an eye-catching logo, and pay attention to whether the production date is in the near future.
Check the rated capacity of the battery.
The larger the rated capacity marked on the battery, the longer the battery discharge time. Do not buy a battery without a rated mark. Check whether it is dedicated to the battery train from China. If there are multiple capacity marks, the rated capacity should prevail. If necessary, you can contact the battery operator. Consultation with technical staff of the train manufacturer.