I will use Macbook laptop usually used in laptop battery (11.1V, 4800mAh; open the batteries is 6 18650 series and parallel), the systems battery information visibility, power display 0, electric charge does not enter (the phenomenon is at the beginning of the charge state, a period of time, the charge light flashing, off, and then in the charge state). Voltage measured with BatteryMon normal 12V. I remove the battery with a multimeter to measure the battery voltage is normal (3.9V). Now I suspect control chip lock, who can tell me the situation and cause the battery lock common to judge the battery lock. How can i resolve.