"battvolts" in ups.conf, in which one specified the battery.voltage reported by the UPS when discharged (just before it turns itself off, not when it triggers a low battery event), and the voltage when the UPS is full. For example... battvolts = 20:26.2 ...would mean "battery.voltage: 20" when almost completely discharged and "battery.voltage: 26.2" when fully charged. The value you are obtaining for "battery.charge" is just a best effort value based on data obtained from other models. If that value is incorrect, the only way to set it straight is to use the "battvolts" option. -- Carlos Rodrigues