Dell OptiPlex 390 Technical Guide - Page 19

DELL™ OPTIPLEX™ 390 TECHNICAL GUIDEBOOK -FINAL POWER NOTE: These form factors utilize a more efficient Active Power Factor Correction (APFC) power supply. Dell recommends only Universal Power Supplies (UPS) based on Sine Wave output for APFC PSUs, not an approximation of a Sine Wave, Square Wave, or quasi-Square Wave. If you have questions, please contact the manufacture to confirm the output type. 3.0v CMOS battery (Type and estimated battery life) Brand Type Voltage Composition JHT CR-2302L/ 3V Lithium BE Life Continuous Discharge Under 15 kΩ Load to 2.0V EndVoltage. 20℃±2℃.940Hrs. or Longer.910Hrs.or Longer after 12 months. MITSUBISHI CR2302 3V Lithium Continuous Discharge Under 15 kΩ Load to 2.0V EndVoltage. 20℃±2℃.940Hrs. or Longer.910Hrs.or Longer after 12 months. 0℃±2℃. 850Hrs. or Longer.820Hrs.or Longer after 12 months. 19