Amazon.com: Rome Tech RTC CMOS Battery for Dell Latitude 2110 Dell Latitude 2120 Dell Latitude E5440 Dell Latitude E5450 Dell Latitude E5540 - Laptop Backup CMOS BIOS Battery CR2032 with 2 Pin
What is a real-time clock (RTC) battery backup switching circuit? | FAQs | Nisshinbo Micro Devices
Amazon.com: PCRepair Replacement CMOS RTC Battery for HP Elitebook 8460p 8460w 8770w Probook 6460b 651948-001 : Electronics
The RTC battery on my boktai game had died recently and needed a new one soldered on. Sometimes I get a little nervous when the game is worth $100+ : r/Gameboy