Someone with a Powacycle electric bike (Fiveways BN1)

Hi, I am hoping someone can help just check if the 26V Li-ion powacycle battery I have is okay or there is a poor connection that might have been due to me changing the two-prong battery connector on the bike. Before this the battery worked fine. So, I would just like to see if the symptoms are the same if put onto another Powacycle (Salisbury or Windsor) model. I can come over with the battery. Thank you. Kind regards, Jazz