Charging Failures; Regenerative Braking - Segway PT x2 Reference Manual

Charging Failures

If a failure is detected during charging, all charging will stop.
Depending on the nature of the failure, a solid red Charge Indicator
light displays or the Charge Indicator light is off.
If either or both Charge Indicator lights are red or off, check the
following:
1. If the Charge Indicator lights are off (no illumination), check that
AC power is present, and ensure the Power Cord is full seated in
the Charge Port.
2. If AC power is present and the Charge Indicator lights are either
red or off, unplug the power cord, then remove and reseat the
Battery Pack(s).
3. If these actions fail to resolve the problem, contact an Authorized
Segway Dealer or Distributor.

Regenerative Braking

The Segway PT has a regenerative braking system that charges the
Batteries when descending a hill or slowing down.
When you ride down a hill, you may notice an increase in the Battery
charge level. If your Batteries are already completely full at the top of
a hill, when you descend, you may feel the Speed Limiter engage to
keep the Segway PT from overcharging its Batteries.
For more information on the Speed Limiter, see "Safety
Shutdown" on page 55.
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For instructions, see "Removing the Batteries" on
page 100 and "Reattaching the Batteries" on
page 102.