Small Engine Troubleshooting Problems? Ask a Mechanic Now.
Welcome to JUST ANSWER small engines, let me try to help you !! I don't know it all, but maybe together we can get you a satisfactory answer!
72 volt car. Do you ave a voltmeter to check the battery pak voltage and each battery? With a battery pack, the weakest battery is all you get! Like a chain, the weak link is what the charger see and is first t shutoff the charger and slow drive. With All batteries being usually the same age, you may need to replace the rest of the pack!