Amazon.com: Synergy Digital CMOS/BIOS Battery, Works with Dell Latitude E4310 CMOS/BIOS, (Li-Ion, 3V, 200 mAh) Ultra High Capacity, Compatible with Acer 23.22207.041 Battery : Electronics
2 x CR2032 BIOS CMOS 3V Battery Compatible with Dell Latitude E4310 E6400 E6410 E6500 E6510 E5400 E5500 Series 3-Pin 3-Wire Button Batteries: Amazon.co.uk: Computers & Accessories
vhbw Li-Ion BIOS Battery 200 mAh Notebook Laptop Dell Precision M4600, M6600, Vostro 150 such as 077 A00, 0MR652, 313 020, GC02001DR0.: Amazon.de: Computer & Accessories