HP EliteBook 820 G2 Notebook PC and HP EliteBook 720 G2 Notebook PC - Maintenance and Service Guide

RTC battery
Description Spare part number
RTC battery (includes cable and double-sided adhesive) 702853-001
Before removing the RTC battery, follow these steps:
1. Turn o the computer. If you are unsure whether the computer is o or in Hibernation, turn the
computer on, and then shut it down through the operating system.
2. Disconnect the power from the computer by unplugging the power cord from the computer.
3. Disconnect all external devices from the computer.
4. Remove the service cover (see Service cover on page 37).
5. Remove the battery (see Battery on page 39).
6. Remove the keyboard (see Keyboard on page 50).
Remove the RTC battery:
1. Disconnect the RTC battery cable (1) from the system board.
2. Detach the RTC battery (2) from the top cover. (The RTC battery is attached to the top cover with double-
sided adhesive.)
3. Remove the RTC battery and cable.
Reverse this procedure to install the RTC battery.
56 Chapter 6 Removal and replacement procedures for Authorized Service Provider parts