Dell Inspiron M731R (5735, Late 2013) - Manual (Page 5)

Battery
Type 6‑cell “smart” lithium ion (65 WHr)
Dimensions:
Width 10.72 in (272.40 mm)
Depth 1.82 in (46.30 mm)
Height 1.39 in (35.40 mm)
Weight 0.79 lb (0.36 kg)
Voltage 11.10 V
Charging time (approximate) 4 hours
Operating time Varies depending on operating conditions and
can significantly reduce under certain power‑
intensive conditions.
Life span (approximate) 300 discharge/charge cycles
Temperature range:
Operating 0 °C to 35 °C (32 °F to 95 °F)
Storage –40 °C to 65 °C (–40 °F to 149 °F)
Coin‑cell battery CR‑2032
Power Adapter
Type 65 W
Input voltage 100 VAC–240 VAC
Input current (maximum) 1.70 A
Input frequency 50 Hz–60 Hz
Output current (continuous) 3.34 A
Rated output voltage 19.50 VDC
Temperature range:
Operating 0 °C to 40 °C (32 °F to 104 °F)
Storage –40 °C to 70 °C (–40 °F to 158 °F)