Synergy Digital CMOS/BIOS Battery, Works with Dell Latitude E5410 CMOS/BIOS, (Li-Ion, 3V, 200 mAh) Ultra High Capacity, Compatible with Acer 23.22207.041 Battery - Walmart.com
Where is the CMOS battery located on an Acer Revo One RL85 mini desktop PC, and what kind of battery is it? - Quora