Hybrid SUVs use an internal-combustion engine together with electric-drive components to propel the vehicle. A battery stores energy for electrical assistance, and the control system manages when the engine, motor, or a combination contributes. During suitable slowing, the electric drive can recover some motion energy and return it to the battery.
The power flows depend on the design. Some hybrids primarily assist the engine, some can move electrically under certain conditions, and plug-in hybrids add external charging. The shared idea is coordinated energy use, not a universal promise that the engine stays off or that the battery can power every trip.