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Cuts off at 11.8 V, not at 7.8 V

DkevEu Remote isolator with LED, 240 A, metal body, 120 s delay below 11.8 V

A remote-controlled 12 V battery isolator rated 240 A with an LED and a metal body, cutting off automatically 120 seconds after the battery falls below 11.8 V.

DkevEu remote battery isolator with an LED indicator

DkevEu Remote isolator with LED, 240 A, metal body, 120 s delay below 11.8 V

A remote-controlled 12 V battery isolator rated 240 A with an LED and a metal body, cutting off automatically 120 seconds after the battery falls below 11.8 V.

Continuous
240 A, from the title
Intermittent current
Nowhere in the listing
DC voltage rating
12 V, from the title
Load-switching capability
Nowhere in the listing
Terminals
Connected on the negative side for stable performance, fourth bullet; the terminals themselves are not described
Mounting
Nowhere in the listing
Operation
A radio remote with an LED; below 11.8 V the switch cuts power automatically after 120 seconds, third bullet. Described as an upgraded version using a metal part where the previous generation did not, second bullet
Amazon reference
B0FBGQP2QD (same reference on 4 Amazon marketplaces)
EAN
0768634743617
  • The cut-off threshold is 11.8 V, which protects a lead-acid battery before it is deeply discharged
  • A delay of 120 seconds, so a momentary sag does not disconnect the vehicle
  • No standby current, which the other remote switch in this family publishes

Best for: A vehicle parked for weeks where the battery should be saved before it is flat.

≈ €35
Check price on Amazon

Specifications

Continuous
240 A, from the title
Intermittent current
Nowhere in the listing
DC voltage rating
12 V, from the title
Load-switching capability
Nowhere in the listing
Terminals
Connected on the negative side for stable performance, fourth bullet; the terminals themselves are not described
Mounting
Nowhere in the listing
Operation
A radio remote with an LED; below 11.8 V the switch cuts power automatically after 120 seconds, third bullet. Described as an upgraded version using a metal part where the previous generation did not, second bullet
Amazon reference
B0FBGQP2QD (same reference on 4 Amazon marketplaces)
EAN
0768634743617

A remote isolator that acts before the battery is finished.

Eleven point eight volts

The threshold matters more than the feature. A twelve-volt lead-acid battery sitting at 11.8 V is heavily discharged; at 7.8 V it is damaged beyond recovery. This switch acts at the first figure.

The other remote switch in this catalogue acts at the second. Both are called an automatic cut-off and they are protecting different things.

The two-minute wait

Below 11.8 V the switch cuts after 120 seconds. That delay is what separates a protection from a nuisance: a starter, a winch or a compressor pulls the voltage down for a moment, and a switch without the wait would disconnect the vehicle mid-job.

The connection

Negative side, stated. Power off before installing, stated.

What the upgrade is

Described as using a metal part where the previous generation did not, without naming which part. The improvement is claimed; what changed is not.

The lines this listing leaves blank

The standby draw. The other remote switch here gives 20 mA, and on a switch that stays awake to listen for a fob, that is the figure that decides whether it is worth fitting.

Availability

German, French and Spanish Amazon stores quoted about 35 € when this page was compiled.

Italian Amazon store wanted more than 1.6× what the cheapest country wanted. A margin that wide usually means stock shipped in from elsewhere rather than a seller on the ground, so that quote stays out of the range above.

American and British Amazon stores returned nothing at all, so the buy button there runs a search instead of landing on an empty page.

These figures are what Keepa reported on the day this page was last updated. Availability and pricing move without notice.

Prices quoted in this text were read on 16 September 2026. The live price is at the top of the page.

More battery isolator switches

  • HELLA S33 battery isolator with a red key

    HELLA S33 key-operated isolator, 1000 A for 10 s at 12 V, DIN/ISO 40050-IPX2

    A key-operated battery isolator for positive or negative lines, rated 1000 A for ten seconds at 12 V, built to DIN/ISO 40050-IPX2 with two screw terminals.

    Continuous
    Not published as a single figure — instead the listing gives the supply cross-section for each continuous current: 35 mm² at 100 A, 70 mm² at 250 A, 250 mm² at 500 A, fourth bullet
    Intermittent current
    Maximum 1000 A for 10 seconds at 12 V, sixth bullet
    DC voltage rating
    12 V, sixth bullet
    Load-switching capability
    Nowhere in the listing; it switches battery and ignition current, first bullet
    Terminals
    Two screw studs, two nuts supplied per stud, third bullet
    Mounting
    Panel-mounted, rotary operation, from the title
    Operation
    A red key, removable in the off position; either the positive or the negative line can be switched, first and second bullets. DIN/ISO 40050-IPX2, seventh bullet
    Amazon reference
    B004K1ND2C (same reference on 6 Amazon marketplaces)
    EAN
    4082300002508
    • The only switch in this catalogue to cite a standard: DIN/ISO 40050-IPX2
    • Supply cross-sections published against three current levels — it tells you what to wire it with
    • No single continuous rating, so the figure has to be read off the cross-section table

    Best for: A workshop or commercial vehicle where the isolator has to be locked off.

    ≈ $22 / €15
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  • ProPlus two-pole NATO-type battery isolator with a key

    ProPlus Two-pole NATO-type isolator, 500 A continuous / 2500 A peak, with key

    A two-pole NATO-type battery isolator rated 500 A continuous and 2500 A peak, supplied with a key, covering 6 V to 48 V systems.

    Continuous
    500 A, third bullet — the highest continuous rating in this family
    Intermittent current
    2500 A peak for short periods, second bullet
    DC voltage rating
    6 V, 12 V, 24 V, 36 V and 48 V, first bullet — the widest voltage coverage here, and the only switch to reach 48 V
    Load-switching capability
    Nowhere in the listing; it is described as an emergency-stop switch, from the title
    Terminals
    Nowhere in the listing
    Mounting
    Two-pole, NATO type, from the title
    Operation
    A key is included, first bullet
    Amazon reference
    B0198UJ3AU (same reference on 5 Amazon marketplaces)
    EAN
    8718546657245
    • 500 A continuous and 2500 A peak — both published, and the highest pair in this family
    • Rated to 48 V, the only switch here that covers a 48 V battery bank
    • The terminals are not described at all, on a 500 A switch

    Best for: A 48 V bank or a heavy vehicle installation where both poles should break at once.

    ≈ €20
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  • QWORK wireless remote battery isolator with two key fobs

    QWORK Remote-controlled isolator, 240 A, two fobs, 20 mA standby

    A wireless remote-controlled 12 V battery isolator rated 240 A with 300 A instantaneous, drawing 20 mA on standby and cutting off automatically below 7.8 V.

    Continuous
    240 A nominal, first bullet
    Intermittent current
    Up to 300 A instantaneous, first bullet
    DC voltage rating
    12 V, first bullet
    Load-switching capability
    Absent as a rating; the remote disables above 12 V for safety, third bullet
    Terminals
    Nowhere in the listing
    Mounting
    Nowhere in the listing
    Operation
    Two wireless remotes, first and fifth bullets; standby consumption 20 mA, automatic cut-off below 7.8 V, operating temperature 30° to 90°. CR2016 cells not included
    Amazon reference
    B0DFPV614Y (same reference on 4 Amazon marketplaces)
    EAN
    0795973840387
    • The standby draw is published — 20 mA — which is the figure a remote isolator has to answer for
    • An automatic low-voltage cut-off at 7.8 V
    • A remote isolator draws current permanently, which is the opposite of what an isolator is for

    Best for: A vehicle whose battery sits somewhere awkward and is isolated often.

    ≈ €22
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Others on the same shelf

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    Post type
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    Size
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    Nowhere in the listing
    Plating
    Nowhere in the listing
    Cable range
    Nowhere in the listing
    Clamping method
    M8 bolt through the cable lug, first and third bullets
    Extra outputs
    None
    Corrosion protection
    Terminal grease recommended in the second bullet; it is not supplied
    Amazon reference
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    EAN
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    • Both post diameters published — 17.5 mm and 19 mm — which is what decides whether they close properly
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    • No material and no plating, so corrosion resistance is unknown

    Best for: Replacing corroded clamps on a standard vehicle or leisure battery.

    ≈ €7
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  • RTSHUK pure copper battery terminals in three pairs

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    Post type
    Standard posts, from the title; 12 V and 24 V named
    Size
    Nowhere in the listing
    Material
    Pure copper, third bullet, named for corrosion resistance, durability and conductivity
    Plating
    Nowhere in the listing
    Cable range
    Nowhere in the listing
    Clamping method
    A thread on the clamp eases assembly, second bullet
    Extra outputs
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    Amazon reference
    B0FJXQJLXF (same reference on 5 Amazon marketplaces)
    EAN
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    • Three pairs, which is the quantity a parallel bank of two or three batteries needs
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    Best for: Building a parallel bank of two or three batteries in one purchase.

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  • Larebidtex universal battery terminals with bolts

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    A pair of universal battery terminals with bolts, offered for cars, boats, motorhomes and caravans, with no specification published in the listing.

    Post type
    Nowhere in the listing
    Size
    Nowhere in the listing
    Material
    Nowhere in the listing
    Plating
    Nowhere in the listing
    Cable range
    Nowhere in the listing
    Clamping method
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    Extra outputs
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    Corrosion protection
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    EAN
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All battery isolator switches