This free app allows you to view detailed diagnostic information for your Hardkorr Bluetooth-enabled deep cycle batteries. You can access a range of useful information including: State of charge Nominal voltage and capacity Live current draw and battery voltage Status (standby, discharging, charging) Warnings and errors (short circuit, over- and under-temp, over- and under-voltage) Total charge cycles Temperature Detailed cell information Supported products include: HKPBATL135B (135Ah Lithium Deep Cycle Battery) HKPBATL135BH (135Ah Lithium Deep Cycle Battery with Heat Film) HKPBATL240B (240Ah Lithium Deep Cycle Battery) HKPBATL240BH (240Ah Lithium Deep Cycle Battery with Heat Film)