TANDY 1000 RL/HD (25-1450/51) Battery Faxback Doc. # 1306 Lithium/CMOS RAM Battery Replacement for the 1000RL/HD (25-1451) is (23-162), which can be obtained at the Radio Shack Store. CAUTION: Improper handling of this special lithium battery can be hazardous. Never recharge, disassemble, or heat the battery above 100°C (or 212°F). Never solder directly to the battery or expose the contents of the battery to water. The Smartwatch in the 1000RL/HD (25-1451) is a battery-backed memory chip that contains date and time information. If you have a 1000RL/HD you will need to replace the SmartWatch (CMOS RAM) battery. It should last at least 3 years with normal use. When it fails, the time and date information is displayed inaccurately. Note: Refer to Faxback Doc. # 1375 for installation location on the Main Logic Board. Smartwatch (25-1033)for the 1000RL floppy (25-1450): Socket location U28 is used for the SmartWatch (25-1033) in the RL Floppy version. (/tmc-04/27/95)