Properly rated jump leads that will actually start a cold diesel. Thick copper-cored cable with fully insulated 600 amp clamps, rated for engines up to 3.5 litres.

• 600A rating, suitable for petrol and diesel up to 3.5L
• 3 metre cable — enough reach for awkward parking
• Insulated copper crocodile clamps
• Cold-flexible insulation that will not stiffen in frost
• Storage bag included

Not sure whether it is the battery or the alternator? We will test both free at our Bracknell workshop.