NEW  LITHIUM BATTERY TECHNOLOGY FOR Lenovo Z575   SERIES NOTEBOOKS CMOS / REAL TIME CLOCK BATTERY 3 Volt LITHIUM BATTERY      Brand New 3 volt Lithium Battery for Lenovo Z575 . This brand new Lithium battery as shown will provide the necessary bias voltage to backup the firmware data that's on the eeprom chip restoring the date/time errors that you obtained on your notebook .  We ask that you first test our battery. Applicable voltage readings will be supplied to you, from which you can then retest to validate the voltage readings before replacing your cmos rtc battery. The user should be able to replace the cmos battery with no problems, although tools and test equipment would be necessary if problems remain on the notebook due to other factors not within the scope of the cmos battery curing the fault of the notebook.