Dell XPS 18 (1810, Early 2013) - Manual (Page 13)

Charge Your Computer
CAUTION: Charge the battery in an environmental temperature between
0 °C and 40 °C (32 °F and 104
°F).
CAUTION: Use only the supplied power adapter and power cable to
charge your computer. Using unauthorized power adapters or power
cables may severely damage to your computer.
NOTE: Your computer cannot be charged through a USB cable.
NOTE: The battery is not fully charged when you first receive it.
NOTE: You receive your computer in shipping mode to prevent it from
accidentally turning on during shipping. To turn on your computer for the
first time, connect the power adapter and then press the power button.
1 Connect the power adapter to your computer.
2 Connect the power adapter into an electrical outlet and charge
your computer until the battery is fully charged.
NOTE: A completely discharged battery takes 4-5 hours to charge fully
while the computer is turned off.
NOTE: The battery charge light on the right side of your computer turns
off once the battery is fully charged.
Setting Up Your Computer │ 13