Dell OPTIPLEX 990 Technical Manualbook page 22

DELL™ OPTIPLEX™ 990 TECHNICAL GUIDEBOOK —VERSION 1.5
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
PANASONIC CR-2032L/
BE
MITSUBISHI CR2032
Voltage Composition
3V Lithium
3V Lithium
Life
Continuous Discharge Under 15 kΩ Load to 2.5V End-
Voltage.
20 ±2 .1183Hrs. or Longer.1133Hrs.or Longer after 12
months.
Continuous Discharge Under 15 kΩ Load to 2.0V End-
Voltage.
20 ±2 .1000Hrs. or Longer.970Hrs.or Longer after 12
months.
0 ±2 . 910Hrs. or Longer.890Hrs.or Longer after 12
months.
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