Dell PowerEdge M710HD - Manual (Page 265)

Installing Blade Components 265
Blade System Board NVRAM Backup Battery
The NVRAM backup battery is a 3.0 V, coin-cell battery.
Removing and Installing the NVRAM Backup Battery
WARNING: There is a danger of a new battery exploding if it is incorrectly
installed. Replace the battery only with the same or equivalent type recommended
by the manufacturer. Discard used batteries according to the manufacturer's
instructions. See the safety instructions that came with your system for additional
information.
1 Remove the blade. See "Removing a Blade" on page 155.
2 Open the blade. See "Opening the Blade" on page 159.
3 If you are replacing the battery in a PowerEdge M915, M910, M905, M805,
M710HD, M610x, or M605 system, you must remove the system board to
access the battery. See "Blade System Board" on page 276.
4 Remove the battery by lifting it straight up from its connector. See
Figure 3-55.
See Figure 7-1 (PowerEdge 915), Figure 7-2 (PowerEdge 910), Figure 7-3
(PowerEdge M905), Figure 7-4 (PowerEdge M805), Figure 7-5 (PowerEdge
M710), Figure 7-6 (PowerEdge M710HD), Figure 7-7 (PowerEdge M610),
Figure 7-8 (PowerEdge M610x), Figure 7-12 (PowerEdge M605), or
Figure 7-13 (PowerEdge M600) to locate the battery on the blade board.
5 Install the new battery with the side labeled "+" facing up. See
Figure 3-55.