Synergy Digital CMOS/BIOS Battery, Works with Dell Latitude E6420 CMOS/BIOS, (Lithium, 3, 200mAh) Ultra High Capacity, Compatible with Dell 077-A00, 0MR652, GC02001DR0, MR652 Battery - Walmart.com
Latitude E6420 BIOS A13 problem - Dell Community
Latitude E6420. ME SpiLock failed after CPU change. - Intel Management Engine - Win-Raid Forum