There is no way tuning your controller has anything to do with your batteries dying in two miles. Did you do the battery load test like kgsc asked?. If you will do the load test on the batteries, that will answer a lot. You say the cart is less than a year old. You say the cart is a 2018 and this is 2020? You said you had Bob tune the cart last fall?? what date was that. Has the cart been running fine since Bob tunes it ? until now? when did it start dying? After a full charge , and 12 hours off the charger and cart not touched the battery pack should read 76.44 for a full 100% charge
