![Amazon.com: DBTLAP CMOS Battery Compatible for HP EliteBook 740 840 G2 840 G3 840 G4 Notebook PC 914384-001 CMOS Bios RTC Battery : Electronics Amazon.com: DBTLAP CMOS Battery Compatible for HP EliteBook 740 840 G2 840 G3 840 G4 Notebook PC 914384-001 CMOS Bios RTC Battery : Electronics](https://m.media-amazon.com/images/I/41k9N34kTlL._AC_SS450_.jpg)
Amazon.com: DBTLAP CMOS Battery Compatible for HP EliteBook 740 840 G2 840 G3 840 G4 Notebook PC 914384-001 CMOS Bios RTC Battery : Electronics
![HP ELITEBOOK 820 G1 G2 CMOS BIOS BATTERY REMOVAL DISASSEMBLY ASSEMBLY REPLACEMENT OR RESET - YouTube HP ELITEBOOK 820 G1 G2 CMOS BIOS BATTERY REMOVAL DISASSEMBLY ASSEMBLY REPLACEMENT OR RESET - YouTube](https://i.ytimg.com/vi/IfUHAT0gmxo/maxresdefault.jpg)
HP ELITEBOOK 820 G1 G2 CMOS BIOS BATTERY REMOVAL DISASSEMBLY ASSEMBLY REPLACEMENT OR RESET - YouTube
![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/842/c05324591.gif)
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 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/969/c05324592.gif)