Please kindly check the white label on the battery for the "JEB" marking. If it displays "C07", kindly purchase the new version of the battery. If not, please purchase the old version. If you still have questions about the new or old version, please feel free to contact us at us.support@hiboy.com for purchasing guidance. Hiboy 48V 15Ah Lithium-Ion Battery for P7 Electric Bikes. This is the original battery. You can order it as a backup or if your old battery is malfunctioning and needs replacement. This battery is compatible only with the Hiboy P7 electric bike. Please note this product can't be returned.