Crazy Cart Battery w/30 Amp Fuse (12V/4.5AH Single Connector)

Bought a new battery after emailing the crazy cart codes to find it wont charge.
I bought an new charger incase it was that and it still wouldn't charge. i put my old battery back in and it started charging so the new battery is either wrong or faulty i emailed razor but had no reply

We were not 100% sure which battery to buy and keen to avoid sending it back I reached out and asked for clarification. The team responded within 24hrs and to be 100% they asked for a serial number of the Crazy Kart. In providing the serial number they confirmed it was the correct battery. Once ordered the battery came within a few days.