Segway PT x2 Reference Manual page 78

4. Plug one end of the Power Cord (provided with your Segway PT)
into a grounded AC outlet (100 V~ to 240 V~; 50 Hz or 60 Hz).
The Power Cord should be properly grounded (see Figure 21).
Figure 21. Plug Power Cord into Charge Port
5. Plug the other end of the Power Cord into the Charge Port.
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