Deceleration/Downhill.
The regenerative braking system charges the battery by using the electric motor to slow the car. When decelerating or driving downhill, the energy generated is stored in the battery.
Regenerative Braking.
When decelerating (e.g. through braking or when driving downhill) the electric motor operates as a generator and regenerates kinetic energy into electric energy, which is then stored in the battery and used to power the electric motor.
coasting setting (available in eco mode)
Affects how the vehicle behaves when you release the accelerator pedal.
Its not as severe as a BEV as the battery is much smaller!
There is also a Recharge mode, that allows the engine to charge the battery whilst on the move however, this is inefficient way of charging the battery. On longer journeys Hybrid mode is best.