What is a real time clock battery?

The real-time clock, or RTC, maintains the internal clock … in real time. The little RTC battery is recharged from the main battery and should keep time and hold power for at least a month all by itself (without power from the AC adapter or from the main battery).

Where is CMOS battery located in HP laptop?

Step 6 CMOS Battery

1. The CMOS battery is located toward the middle left area of the motherboard.
2. Using the spudger, lift the CMOS battery out of its plastic casing.

Do all laptops have a CMOS battery?

You’ll find CMOS batteries in both laptops and desktop PCs, but it’s used more frequently in a laptop. That’s because laptops are usually unplugged for a longer amount of time than desktop PCs.

How to replace a real time clock battery?

With the positive side of the RTC battery facing up, toe the edge of the RTC battery into its socket and gently press down until it snaps into place. Replace the tape that secures the real-time clock battery in its socket. Replace the mSATA drive.

How do you remove a real time clock?

To remove the real time clock battery (CMOS battery or RTC battery), first follow the instructions to remove the computer battery, the optical drive, and the rear corner covers, then follow the steps to remove the base enclosure.

How to replace the RTC battery on a HP ProBook?

Connect the RTC battery cable into its connector on the system board. Replace the top cover. For detailed instructions, see Remove and Replace the Top Cover on HP ProBook 640 and 645 G2 Notebooks. Replace the wireless LAN module. For detailed instructions, see Remove and Replace the Wireless LAN Module on HP ProBook 640 and 645 G2 Notebooks.

How to change the battery on a HP laptop?

Disconnect the Ethernet or modem cable. Disconnect the power cord. HP strongly recommends the use of an anti-static wrist strap and a conductive foam pad when working on the computer. Transfer the computer to a clear, flat, stable work surface over a non-carpeted floor.