This gentlemans batteries are not 12yr old as the post implies. Many of the batteries are fairly new and when we receive them they are simply overdischarged or have the BMS locked. We have found that when this happens there was either a period of time where the batteries were not charged and/or a charger failure has occurred. This can also occur due to a surge or brown out with the incoming power while the machine is charging. This users batteries charged fine, load tested fine, had low internal impedance, and functioned normally on our Segway. The issue occurred with rebuilt batteries and also with OEM Segway batteries. In closure this user either has a charging issue that can be found by testing the Segway charging using this method
http://www.mtobattery.com/segway-charger-testing/ or the user needs to charge the batteries more frequently to ensure the charge level in the batteries is maintained. Take care.