Duracell Alkaline batteries- ideal for Clocks and Radios
Amazon.com: KANBIT Small Digital Travel Alarm Clock Battery Operated, Portable LCD Large Display Alarm Clock with Backlight, Temperature Desk Clock -Silver(Green Light) : Home & Kitchen
3V Lithium CR2032 coin cell PRAM Clock Battery for iMac , Mac Pro, Mac Mini, and PowerMac G5
HP 319603-001 - 3.3 VDC Lithium Coin Real Time Clock (RTC) CMOS Battery for HP Proliant Servers - CPU Medics
Amazon.com: Plumeet Smart Night Light Digital Alarm Clock with Indoor Temperature, Battery Operated Clock Digital Display for Bedrooms, Desk Bedside Gifts Clock (White Light) : Home & Kitchen
Northlight 12 in. Roman Numeral Battery Operated Round Wall Clock 34808638 - The Home Depot