The 601B Battery Capacity Analyzer addresses the need to test and maintain sealed lead acid (SLA) batteries used in backup power UPS, emergency lighting, fire alarms, security systems, and many other electrical systems. By quickly characterizing a battery's response to a load resistance and measuring the battery's internal resistance, these meters display the remaining battery capacity as an indicator of the battery's health. Powered by the battery under test, this model supports testing of both 6 V and 12 V storage type lead acid batteries.