A flat battery always picks the worst possible moment. Jump starters, compact lithium power packs, give you enough power to start your car without needing a second vehicle. Modern units fit in your glovebox and deliver enough peak current for petrol and diesel engines with large displacements.

Battery maintenance is just as important as battery rescue. A trickle charger keeps a stored car or classic at the right voltage without overcharging, and a battery tester tells you in time when replacement is genuinely needed, before the battery leaves you stranded.