I purchased a used ancheer bicycle I would like to buy an additional battery for it can't seem to find out what size motor is in it

[Johnnycsuperior]

I have purchased a used ancheer bicycle
I would like to buy an additional battery for it I can't find the size of the motor anywhere on the bicycle attached are pictures of battery that's in it

Thanks

 

[PedalUma]

Go to the seller and get the original documentation information. This will also help serve provenance of ownership should the question arise. Can you post photos of the bike, the motor, battery and a close up of the underside of the bottom bracket? This will help us to help you.