beefheart "Or the curve controller" -so is the best option Calibration battery, you need a rut and ruteksploer, discharge to zero, remove the battery for 5 minutes, insert, and at night to charge the morning incl. you go on the data / system you delete baterystats.bin off track. the charging and reboot, you need to do two or three cycles. Personally, on my devayse then discharge eroding slowly as it should be.