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FAQs

Cable section. Thin cable heats and drops voltage along its length, so the starter sees far less than the donor battery is actually giving it.

It follows the engine. Section runs 10mm2 through 16mm2, 18mm2, 25mm2 and 29mm2 up to 50mm2. A large diesel needs the heavier sections; a small petrol engine needs less.

It trades against section. A longer cable reaches between awkwardly parked vehicles but loses more voltage over the run, so a long set on thin cable is the worst of both.

The moment of connection can send a spike through vehicle electronics. Cables with surge protection absorb that, which matters more on modern vehicles than on older ones.

Polarity and connection before the attempt is made, so a reversed or poor connection is seen rather than discovered when nothing happens or something fails.

Yes, motorcycle booster cables are held, sized for the far smaller battery and the tighter access round a motorcycle terminal.

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Booster cables

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Cable section is what carries the current and it is the figure that decides whether a set of jump leads will start an engine at all. Thin cable heats and drops voltage along its length, so the starter sees far less than the donor battery is giving. Buying on the appearance of the clamps rather than the cable is the common way this goes wrong.

Section here runs 10mm2 at the light end through 16mm2, 18mm2, 25mm2 and 29mm2 up to 50mm2 on the heavy duty set. A large diesel needs the heavier sections; a small petrol engine will start on considerably less. Section is stated in square millimetres on every set rather than described as heavy or light.

Length trades against section rather than being independent of it. A longer cable reaches between vehicles parked awkwardly but loses more voltage over the run, so a long set on thin cable is the worst of both. Lengths here run 2m to 6.5m. Reading both figures together is what gets a set that reaches and still starts the engine. Reach also has to allow for the vehicles being nose to nose rather than side by side.

Surge protection matters on modern vehicles because the moment of connection can send a spike through the electronics. Cables with surge protection absorb that, and LED cables show polarity and connection before the attempt is made. Tell 07754288583 on WhatsApp what engine has to be started and how far apart the vehicles sit. Both features are on the listing rather than being assumed of the heavier sets.

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FAQs

Cable section. Thin cable heats and drops voltage along its length, so the starter sees far less than the donor battery is actually giving it.

It follows the engine. Section runs 10mm2 through 16mm2, 18mm2, 25mm2 and 29mm2 up to 50mm2. A large diesel needs the heavier sections; a small petrol engine needs less.

It trades against section. A longer cable reaches between awkwardly parked vehicles but loses more voltage over the run, so a long set on thin cable is the worst of both.

The moment of connection can send a spike through vehicle electronics. Cables with surge protection absorb that, which matters more on modern vehicles than on older ones.

Polarity and connection before the attempt is made, so a reversed or poor connection is seen rather than discovered when nothing happens or something fails.

Yes, motorcycle booster cables are held, sized for the far smaller battery and the tighter access round a motorcycle terminal.

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