Lenovo x3550 M5 Installation And Service Manual page 140

Figure 40. RAID adapter battery or flash power module removal for 2.5-inch hard disk drive server models
Steps for removing the RAID adapter battery or flash power module for 3.5-inch hard disk
drive server models.
a. Press the blue release tabs and rotate the battery or power module holder upward.
b. Slightly press the retention clip outward to remove the battery or power module.
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Lenovo System x3550 M5 Installation and Service Guide
Holder
Battery / flash power module
Retention clip