The Moneris Mobile 8300 terminal does not have an ON/OFF switch.
The 8300 Charge Base 2-part Power Cable
IMPORTANT: You must use the exact power adaptor and cable provided with the charging base by Moneris Solutions. Failure to do so may affect the operability of, or cause damage to, the terminal and/or charging base.
To power up (or turn on) the charging base:
Plug the power adaptor cable into the power port ( 
) on the
base.
Plug the power cable into the power adaptor.
Plug the other end of the power cable into a power source, e.g. a wall jack or a power bar.
To power up (or turn on) the terminal:
Press
and hold the green OK key
until the display lights up and the keypad backlight comes on.
OR
Place the terminal on the charging base.
The terminal is ready when the applications menu appears.