![Remove and Replace the Real Time Clock Battery on HP ProBook 640 and 645 G2 Notebooks | HP® Customer Support Remove and Replace the Real Time Clock Battery on HP ProBook 640 and 645 G2 Notebooks | HP® Customer Support](https://support.hp.com/doc-images/162/c05324118.jpg)
Remove and Replace the Real Time Clock Battery on HP ProBook 640 and 645 G2 Notebooks | HP® Customer Support
![Battery for HP ProBook 640 G4,replacement HP ProBook 640 G4 laptop battery from Singapore(48Wh,3 cells) Battery for HP ProBook 640 G4,replacement HP ProBook 640 G4 laptop battery from Singapore(48Wh,3 cells)](https://www.hplaptopbattery.com.sg/pic_big_Zoom/cd03xl-3cell-2.jpg)
Battery for HP ProBook 640 G4,replacement HP ProBook 640 G4 laptop battery from Singapore(48Wh,3 cells)
![Battery for HP ProBook 640 G4,replacement HP ProBook 640 G4 laptop battery from Singapore(48Wh,3 cells) Battery for HP ProBook 640 G4,replacement HP ProBook 640 G4 laptop battery from Singapore(48Wh,3 cells)](https://www.hplaptopbattery.com.sg/pic_big_Zoom/cd03xl-3cell-4.jpg)
Battery for HP ProBook 640 G4,replacement HP ProBook 640 G4 laptop battery from Singapore(48Wh,3 cells)
![Battery for HP ProBook 640 G4,replacement HP ProBook 640 G4 laptop battery from Singapore(48Wh,3 cells) Battery for HP ProBook 640 G4,replacement HP ProBook 640 G4 laptop battery from Singapore(48Wh,3 cells)](https://www.hplaptopbattery.com.sg/pic_big_Zoom/cd03xl-3cell-5.jpg)