https://support.lenovo.com/my/en/videos/ytv101475-lenovo-thinksystem-dm7100-installing-an-nvdimm-battery
Lenovo ThinkSystem DM7100 - Installing an NVDIMM battery - Lenovo Support MY
This video introduces the procedure used to install an NVDIMM battery on a Lenovo ThinkSystem DM7100
lenovo thinksystembattery supportinstallingnvdimm