Jump leads

Einhell BT-BO 25/1 A LED SP

The pair with lights in the clamps — which matters because a car that will not start is almost always a car that will not start at night.

Einhell BT-BO 25/1 A jump leads with LED clamps

Einhell BT-BO 25/1 A LED SP

The pair with lights in the clamps — which matters because a car that will not start is almost always a car that will not start at night.

Conductor: 31.4 mm (1.24 in)² aluminum, stated
Clamps: 4 fully insulated pole clamps, stated
Lighting: LED-lit clamps for poorly lit conditions, stated
Engine size: Petrol engines up to 5500 cc, stated
Amazon reference: B01C8OUSMA
EAN: 4006825603514

LEDs in the clamps — the one genuinely useful innovation in this category
Fully insulated clamps, which is what stops a dropped clamp shorting on a wing
Aluminum carries roughly two-thirds of what copper carries for the same section

Best for: A boot pair for a petrol car, used at night more often than not.

≈ $58

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Specifications

Conductor: 31.4 mm (1.24 in)² aluminum, stated
Clamps: 4 fully insulated pole clamps, stated
Lighting: LED-lit clamps for poorly lit conditions, stated
Engine size: Petrol engines up to 5500 cc, stated
Amazon reference: B01C8OUSMA
EAN: 4006825603514

What lands on the bench

A pair of jump leads with 31.4 mm (1.24 in)² aluminum conductors, four fully insulated clamps and LEDs built into the clamps.

The specification that matters

Cross-section and material. Together they decide how much current the leads can carry without heating, and they are the only figures worth comparing. Einhell publishes both.

The feature nobody else has

Lights in the clamps. Jump-starting happens in car parks at night, in the rain, with a phone torch in your teeth. Two LEDs where the connection is made removes that entirely.

Where they stop

Petrol engines up to 5500 cc, stated. Nothing is published for diesel, which asks for more current — the heavier leads in this hub are the answer there.

Availability

On sale at around $58 on the American Amazon store at the time of checking.

Prices and availability are what Keepa reported on the date this page was updated; both move.

Prices quoted in this text were read on 4 September 2026. The live price is at the top of the page.

The questions that reach us

Aluminum or copper?

Copper conducts better for the same cross-section — roughly a third more. Aluminum leads compensate with a larger section, which is why 31.4 mm (1.24 in)² of aluminum is a reasonable specification rather than a poor one.

Why do the clamps need to be insulated?

Because a live clamp dropped onto bodywork shorts the battery. Fully insulated clamps mean only the jaws are exposed, which is the difference between a spark and a fire.

Tools this fits

More jump leads

Energizer 6 AWG, 16 ft, with bag

A 6-gauge pair at the lowest price for its length here, sharing its bullets with another brand.

Gauge
6 AWG — about 13.3 mm (0.52 in)² on the standard table
Length
16 ft (4.9 m)
Conductor
Copper-clad aluminum, thick vinyl coating
Cold flexibility
Stated flexible at −40 °C (-40 °F)
Clamps
Strong spring and a handle; vinyl coated
Supplied
High-grade travel bag
Stated vehicles
Trucks, SUVs, full-size, mid-size and compact cars
Packed size
280 × 276 × 79 mm (11 × 10.9 × 3.11 in), from the shipping record
Bullets
All five shared with the K KRIËGER KJC616 pair, slogan included
Upper temperature limit
NOT PUBLISHED
Amp rating
NOT PUBLISHED
Clamp jaw opening
NOT PUBLISHED
Amazon reference
B079LHNH8D
EAN
0841915003072
- $19.96, the cheapest 16-foot lead on this shelf
- Flexible at −40 °C (-40 °F), which is the temperature these are used at
- 13.3 mm (0.52 in)² of aluminum, the thinnest conductor on this shelf
Best for: A second car’s boot, where price and a bag matter more than section

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HELLA 4.5 m (15 ft) 35 mm (1.38 in)² leads

Length and section together: 4.5 meters (15 ft) of 35 mm (1.38 in)², which covers a large diesel and reaches a car parked awkwardly.

Length
4.5 m (15 ft), stated
Section
35 mm (1.38 in)², stated
Material
Copper-coated aluminum, stated
Engine sizes
Petrol to 7000 cc, diesel to 4000 cc — stated
Amazon reference
B07JKB78Z6
EAN
4082300745214
- The best combination of length and section here for the price
- A 4000 cc diesel rating covers vans and large estates
- Bulkier to store than the 3 m (10 ft) pairs
Best for: A diesel, a van, or anyone who has ever failed to reach with a 3 m (10 ft) pair.

≈ $145
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IWH 6 m (20 ft) 50 mm (1.97 in)² professional leads

The professional pair: six meters of 50 mm (1.97 in)² with solid cast clamps and stated DIN compliance — the set that ends the argument.

Length
6 m (20 ft), stated
Section
50 mm (1.97 in)² aluminum-copper, stated
Standard
Stated to meet DIN requirements
Clamps
Solid cast clamps, stated
Application
Petrol 12/24 V to 7000 cm (2755.9 in)³, diesel to 4000 cm (1574.8 in)³ — stated
Amazon reference
B07FWJG6NC
EAN
4045914756373
- Six meters reaches almost any parked car, at a section large enough that length costs nothing
- Solid cast clamps rather than pressed sheet — the part that fails on cheap leads
- Four times the price of the lightest pair here
Best for: A workshop, a van, or anyone who lends their leads to other people.

≈ $190
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Others worth a spot in the toolbox

Griot’s Garage 3 in black finishing, set of 3

The black pad of the system: fine swirls on delicate paint, on a micro hook-and-loop face.

Diameter
3 in (76 mm)
Color and grade
Black — fine polishes and sealants, delicate paint
Backing
Upgraded micro hook-and-loop
Face
Flat, beveled
Bonding
Thermoset
Washability
Machine washable
Also for
Applying protective sealants
Use
By hand or on a random orbital
Pack
3
Foam structure
NOT PUBLISHED — the orange pad states open-cell
Density figure
NOT PUBLISHED
Intended plate size
NOT PUBLISHED
Amazon reference
B00D8Y71ZM
EAN
0874596006087
- The finishing step, which no published set on this shelf can identify
- A micro hook-and-loop face, denser than the orange pad’s plain one
- No density figure, and no comparison with the correcting pad’s foam
Best for: The pass after correcting, and delicate paint that a cutting pad would mark

Check price on Amazon
Griot’s Garage 3 in red wax, set of 3

The red pad: application of waxes and sealants, with no cutting claim of any kind.

Diameter
3 in (76 mm)
Color and grade
Red — application of waxes and sealants only
Stated cut level
None — no defect removal claimed anywhere in the listing
Foam
Premium open-cell, as on the orange correcting pad
Face
Flat, beveled, stated to avoid high spots
Backing
Upgraded micro hook-and-loop
Bonding
Thermoset
Washability
Machine washable
Pack
3
Price
$18.89 — the cheapest item on this shelf
Density figure
NOT PUBLISHED
Maximum speed
NOT PUBLISHED
Amazon reference
B00469HO0U
EAN
0874596002843
- The only pad here that claims no cutting at all, which is the point of it
- Keeps wax and sealant out of the pads used for correction
- Differs from the orange pad only by a density figure neither publishes
Best for: The last pass, and keeping sealant out of every other pad you own

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Griot’s Garage 3 in orange correcting, set of 3

The orange pad of a three-color system: light to moderate defects, in the size that reaches a bumper corner.

Diameter
3 in (76 mm)
Color and grade
Orange — light to moderate defects, in a named four-step system
Foam
Premium open-cell, which carries and releases compound
Face
Beveled, flat
Bonding
Thermoset, stated to resist tearing
Backing
Hook and loop
Washability
Machine washable
Use
By hand or on a random orbital
Pack
3
Density figure
NOT PUBLISHED
Pad thickness
NOT PUBLISHED
Intended plate size
NOT PUBLISHED
Amazon reference
B00469HNR4
EAN
0874596002836
- The cutting step of the only named, consistent color system on this shelf
- 3 in reaches bumpers, mirrors and badges, where most swirls are
- Four passes to cross a door, where a 6.5 in pad is one
Best for: Bumpers, mirror caps and the area round door handles

Check price on Amazon