NEW  LITHIUM BATTERY TECHNOLOGY FOR HP PAVILION DV4000 SERIES NOTEBOOKS CMOS / REAL TIME CLOCK BATTERY (replaces models and part references below) replaces P/N :  417076-001 replaces 23.22047.001 3 Volt LITHIUM BATTERY WITH 3 PIN PLUG THIS BATTERY IS FOR THE MODELS HP PAVILION DV4000 HP Presario V4110EA  HP Presario V4111AP  HP Presario V4112AP  HP Presario V4113AP  HP Presario V4114AP  HP Presario V4115AP HP Presario V4116AP  HP Presario V4117AP  HP Presario V4118AP  HP Presario V4119AP  HP Presario V4120EA  HP Presario V4120TU  HP Presario V4120US  HP Presario V4121TU  HP Presario V4122TU  HP Presario V4125CL  HP Presario V4130EA  HP Presario V4133EA  HP Presario V4135US  HP Presario V4144EA   HP  Presario V4145EA  HP Presario V4146EA HP Presario V4147EA  HP Presario V4160EA  HP Presario V4200  HP Presario V4300  HP Presario V4400  HP Presario V4400t  HP Presario V4435NR  HP Presario V4440US   Brand New 3 volt Lithium Battery for HP Compaq Pavilion & Presario series Notebooks. 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 Pavilion/Presario models listed. 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.