Dell XPS 12 (9Q33, Mid 2013) - Manual (Page 5)

Battery
Type 6‑cell “smart” lithium‑ion (45 WHr)
Dimensions:
Height 5.16 mm (0.20 inch)
Width 113.16 mm (4.46 inches)
Depth 287.00 mm (11.30 inches)
Weight 0.28 kg (0.62 lb)
Voltage 7.40 VDC
Operating time Battery 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 45 W
Input voltage 100 VAC–240 VAC
Input current (maximum) 1.30 A
Input frequency 50 Hz–60 Hz
Output current 2.31 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)