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Electric and hybrid , Buying a used car , Know your car · Обновлено 2026-10-18

Hybrid types explained: mild, full and plug-in

The word hybrid covers several quite different technologies. A car sold as a hybrid may need no plug at all, or it may need regular charging to deliver its promised economy. Knowing the types helps you avoid paying for something that does not fit how you drive.

The common idea

A hybrid combines a combustion engine with one or more electric motors and a battery. The electric part helps in the situations where engines are least efficient: pulling away, crawling in traffic and slowing down. It also recovers energy when you brake, which a normal car wastes as heat.

Mild hybrid

A small electric motor and a small battery assist the engine. The car cannot usually drive on electricity alone, or only for a few moments.

• What you get: smoother start-stop, a little extra pull, a modest reduction in fuel use.
• Charging: none needed.
• Good for: drivers who want slightly better economy without changing habits.

Full hybrid (self-charging)

A larger battery and motor can move the car by themselves at low speeds, and work together with the engine at other times. The car decides on its own which source to use. You fuel it like a normal car and never plug it in.

• What you get: clearly lower fuel use in town and mixed driving, a smooth and quiet ride at low speeds.
• Charging: none needed. The battery is charged by the engine and by braking.
• Good for: city and suburban drivers, and those who cannot charge at home.
• Less impressive: steady fast motorway driving, where the engine does most of the work.

Plug-in hybrid

A big battery that you charge from a socket, plus an engine. It can drive a useful distance on electricity alone and then behaves like a hybrid once the battery is depleted.

• What you get: electric driving for short daily trips and a petrol or diesel engine for long journeys with no range worries.
• Charging: you must plug it in regularly to benefit. See charging explained.
• Good for: drivers with short daily commutes and a place to charge, who also take occasional long trips.
• Watch out: if you never charge it, you carry a heavy battery and motor for little gain, and consumption can be higher than in a normal car of the same size.

Range-extender and other variants

Some cars use the engine only as a generator for the battery, while the wheels are always turned by an electric motor. These are less common, and the details vary by model. Check how the particular car works before you compare it with others.

Costs and upkeep

• Hybrids cost more to buy than equivalent petrol cars, though used prices can narrow the gap.
• The engine still needs oil changes and normal servicing; see how often to service.
• Brakes often last longer because regenerative braking does part of the work.
• The battery is the main long-term question. Ask about its warranty and any health check, and see EV battery health, which applies in part to hybrids too.
• Insurance and repairs can be higher if the car has complex electronics.

Work out the numbers for your own driving with the cost of ownership tool.

Buying used

Look for service records and ask about the hybrid system, not only the engine. Warning lights relating to the hybrid system or battery deserve a workshop visit; see dashboard warning lights. Test the car in town and on a faster road, and listen for the engine starting and stopping smoothly. The general approach is in inspect a used car.

Choosing

If you have no home charging, a full hybrid is usually the simplest step towards lower consumption. If you can charge daily and your trips are short, a plug-in hybrid can be efficient. If you do mostly long motorway miles, a hybrid helps less, and other options may suit you better. See EV, hybrid or petrol.

Questions to ask a seller

• Which type of hybrid is it, and does it need to be plugged in?
• Has the hybrid system been serviced by a workshop that knows the technology?
• Is there a battery warranty, and does it transfer?
• Does the plug-in version come with its charging cable?
• Have any hybrid warning lights ever appeared?

What to remember

• Mild hybrids give a small saving and never need a plug.
• Full hybrids drive electrically at low speeds and charge themselves.
• Plug-in hybrids only pay off if you charge them regularly.
• Ask about the battery warranty and service history on a used one.

Battery Beginner Charging Costs Fuel Hybrid Petrol