Dell XPS 10 Tablet - Manual (Page 12)

Charging the tablet
CAUTION: Charge the battery in an ambient temperature of 0 °C to
35 °C.
CAUTION: Use only the supplied power adapter and power cable to
charge your tablet. Using unauthorized power adapters or power
cables may cause severe damage to your tablet.
NOTE: The battery is not fully charged when you unpack your tablet.
1 Connect the power adapter to the 40-pin power-adapter port on
the tablet.
2 Connect the power adapter to an electrical outlet and charge the
tablet until the battery is fully charged.
NOTE: The tablet battery requires about 4 hours to fully charge.
NOTE: You can also trickle charge the tablet via USB connection. The
battery requires up to 24 hours to fully charge depending on the power
output of the USB port.
Setting Up Your XPS 10 Tablet 12