Acer B1-730HD - Manual (Page 8)

8 - Using your tablet
of the USB cable into the power adapter body (it will fit in only one
direction).
Connecting power
Connect the power connector to your tablet and plug the AC adapter
into any AC outlet.
CL
OSE
OPEN
1
C
OPEN
2
Warning
Only use the bundled power adapter to charge your device.
Note
It is normal for the tablet surface to become warm during charging or long
periods of use.