Beware of fake capacity and cell battery for your ebike from AliExpress. I bought a replace battery for my ebike 48v 72 AH from AliExpress , however ebike did not even go as far as 2 km then it stopped. Battery was not 72AH was not even 10AH . So I started my research on AliExpress , what I found the majority of suppliers on AliExpress fake the capacity and quality cells battery's in order to get sales. So beware buying ebike batteries from ALIEXPRESS. Check capacity and weight to determine the correct capacity, however i would not trust that site if you paid me. cheers