The mitsubishi CR17335SER Lithium Battery is designed For Mitsubishi Q02CPU, Q02HCPU, Q06HCPU, Q12HCPU, Q12PHCPU, Q12PRHCPU, Q25HCPU, Q25PHCPU, Q25PRHCPU, Q170HBATC, Q172HCPU, Q173HCPU Programmable Logic Controllers. Low Self Discharge Rate Gives This Cell A 10 Year Shelf Life. Stable Voltage Broad Temperature Range (-40°C To +80°C). High Energy, High Reliability 3.0 Volt Power Source Is An Excellent Choice For Memory Backup Applications.