The eGO! is an electronic odometer that measures cycle-life of batteries, compensating automatically for partial cycles and abuse conditions. It records important data about how the battery is used throughout its lifetime, including electrolyte level, temperature and over-discharge. The data can be viewed on a PC or Laptop and provides managers with an accurate life prediction of their battery fleet, better enabling them to plan for future purchases. In addition the eGO! can be used as an educational tool, enabling managers to highlight to their staff the consequences of poor battery maintenance and management.