Full Review ⭐ Sealey 12V: SV12 Series 3/8" Sq Drive Impact Wrench Kit - 2 Batteries CP1204...

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Full Review ⭐ Sealey 12V: SV12 Series 3/8" Sq Drive Impact Wrench Kit - 2 Batteries CP1204KIT

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Price: £111.17
Brand: Sealey
Part Number: ‎CP1204KIT
Power Source: ‎Battery-powered
Product Dimensions: ‎32 x 23 x 16 cm; 2 Kilograms
Voltage: ‎12 Volts
Manufacturer: ‎Sealey
Batteries Included?: ‎Yes
Batteries Required?: ‎Yes
Battery Cell Type: ‎Lithium Ion
Colour: ‎Red
Included Components: ‎Impact Wrench Kit 3/8"Sq Drive 12V SV12 Series - 2 Batteries
Item Weight: ‎2 kg

Review and analysis

The Sealey SV12 Series 3/8" Sq Drive Impact Wrench Kit is a compact and lightweight impact wrench suitable for automotive and light industrial applications. This 12V cordless impact wrench comes as a kit with 2 lithium ion batteries, ensuring you always have a charged battery ready to go.

With 110 Nm maximum torque, the SV12 provides ample power for most common tasks like loosening stubborn bolts or lug nuts. Its brushless motor design is efficient and provides long runtimes per charge. The 3/8" square drive accepts standard impact sockets, making it versatile for various jobs.

Weighing only 1.95 kg with battery, the SV12 is easy to handle and maneuver into tight spaces. LED lights illuminate dark work areas. Overall, it's a convenient cordless impact wrench kit for mobile mechanics, auto hobbyists, and home DIYers.

Design & Build Quality

The Sealey SV12 Series 3/8" impact wrench is built to last with its durable composite housing that provides protection against drops and impacts. Despite the tough exterior, the tool feels comfortable and balanced in hand thanks to its ergonomic rubber grip and compact size weighing just 1.9 kg.

The inner metal hammer mechanism and precision machined components give this wrench the sturdiness required for professional use. Sealey has designed it to withstand the demands of the workshop while remaining comfortable for extended periods of use.

The 3/8" square drive is made from hardened steel to resist wear and tear when attaching sockets. This allows you to securely fasten a wide range of different sized sockets for versatility.

Overall, the high-quality materials and robust construction make this a heavy-duty impact wrench suitable for mechanics who need a reliable tool that can handle repetitive professional use without breaking down. Yet it retains an ergonomic lightweight body for reduced fatigue.

The Sealey 12V SV12 Series 3/8" Drive Ratchet Wrench Kit with 2 Batteries (CP1202KIT) is an excellent choice for mechanics looking for a durable and versatile cordless impact wrench. The kit comes with two 12V 2.0Ah lithium batteries to ensure you always have ample power when working in the garage or on the job site. The batteries provide long runtimes and quick recharging so you can get back to work faster.

Like the impact wrench itself, the batteries feature a sturdy construction and are built to withstand heavy use. Each battery is equipped with an LED fuel gauge so you can easily check the remaining charge level. The kit also includes a 110V charger for conveniently repowering the batteries whenever needed.

With 290 ft-lbs of maximum torque, this cordless impact wrench packs impressive power in a compact size. The variable speed trigger gives you control and precision when driving in fasteners. The 1/2" anvil is compatible with all standard impact sockets.

Weighing only 4.4 lbs with a battery installed, the SV12 is light and well-balanced for reduced fatigue over long work sessions. The rubberized grip enhances comfort and control when ratcheting fasteners. A built-in LED light illuminates dim work areas.

From the durable composite housing to the long-lasting lithium batteries, this Sealey 12V SV12 Series 3/8" Drive Ratchet Wrench Kit with 2 Batteries is designed and built to provide reliable power and performance for professional automotive use.

Power & Torque

The Sealey SV12 impact wrench delivers decent power and torque capabilities for a compact 12V cordless tool. It's equipped with a 3/8" square drive for versatility.

The brushless motor provides 270 Nm of max torque, which should be sufficient for most automotive and light industrial fastening applications. It can handle lug nuts, suspension components, and other stubborn bolts. The torque output is comparable to many 18V impact wrenches. For its size, the SV12 generates good RPMs up to 2,800. This gives it decent speed for driving and removing fasteners quickly. The variable speed trigger provides good control over the RPMs.

Overall, the power and torque is quite impressive for a 12V impact wrench. It packs a punch while still being lightweight and portable thanks to the compact battery design. The SV12 hits the sweet spot between power and convenience.

Sealey also offers the SV20 series of 20V impact wrenches for even more power. The SV20 1/2" Drive model delivers 340 Nm of max torque with up to 3,400 RPM. It's designed for more heavy duty applications where the 12V SV12 may not have quite enough grunt. With dual 20V batteries, the SV20 provides longer runtime as well. The brushless motor is efficient and maintenance free.

For mechanics, automotive technicians, and industrial users needing serious torque for lug nuts, axle nuts, suspension components, and other challenging fasteners, the SV20 20V impact wrench is a great option. It provides more power than the 12V SV12 but retains cordless convenience thanks to the latest lithium battery technology. The SV20 gives users the ability to tackle professional jobs without being tethered to a power cord.

In summary, Sealey offers both 12V and 20V cordless impact wrench models to suit different power needs. The compact SV12 is great for general automotive jobs where portability is key. When more torque is required, the SV20 packs a professional-grade punch in a convenient cordless package.

Battery & Charging

The Sealey CP1204KIT impact wrench comes with two 12V lithium ion batteries. The batteries have a decent run time, providing enough power to get through most automotive jobs before needing a recharge. While the batteries aren't best in class, they get the job done for most users.

The lithium ion batteries hold a charge well when not in use, so you don't have to worry about them self-discharging over time. The charger is quick and can fully recharge a battery in around 30-40 minutes. This allows you to get back to work without too much downtime waiting for the batteries to charge.

Some users may want to invest in an additional battery or two for marathon work sessions, but for most DIY mechanics the included set will be sufficient. The charger conveniently shows the charging status with an LED indicator, switching from red (charging) to green (fully charged).

Overall, the battery life and recharging performance is respectable for this class of impact wrench. The batteries are compact and lightweight, making the tool easy to maneuver. While more expensive brands offer better battery tech, the Sealey batteries deliver adequate run time for most users.

Noise Level

The Sealey SV12 impact wrench operates at a noise level of 88 dBa, which is typical for an air impact wrench of this size. The noise is noticeable but not excessive. Wearing ear protection is recommended for prolonged use, as per OSHA guidelines for noise exposure.

The noise comes mostly from the hammering action inside the tool. Some users may find it slightly louder than brushed motor impacts, but not uncomfortably so. It's quite comparable to similar impact drivers from other brands.

At a workplace, operating for an 8 hour shift, the noise level would require ear protection after just 15 minutes of accumulated exposure. In most home shops or garage use, the noise level is unlikely to be an issue except for extended, continuous operation.

Overall, the noise output is moderate and should not deter purchase for most users. Those highly sensitive to noise may prefer an electric or brushed motor impact instead. But for most, the SV12 hits a reasonable balance of power and noise.


The Sealey CP1204KIT comes with a good selection of accessories for a cordless impact wrench kit. In the box you get:

  • 2 x 12V 3.0Ah Li-Ion Batteries
  • 110V Charger
  • Storage Case
  • 3/8" Drive Adaptor

Having 2 batteries is very convenient as you can have one charging while using the other, avoiding any downtime. The included charger plugs into a standard 110V socket and fully charges a battery in around 60 minutes.

The kit comes in a sturdy blow mold case that has custom cutouts for securely storing all the components. This makes it easy to keep everything together and protected.

It also includes a 3/8" drive adaptor which allows you to use standard socket accessories. This is a must have for versatility.

Overall the included accessories provide everything you need to start using the impact wrench right out of the box. The twin battery system prevents any charging delays during jobs. And the case keeps it protected for transport and storage.

Safety Features

The Sealey SV12 impact wrench has a few important safety features built into its design.

One key safety mechanism is the automatic brake. When the trigger is released, the brake engages to quickly stop the bit from spinning. This prevents potential injuries from the bit continuing to rotate after you stop using the tool.

There is also a safety slip clutch that helps prevent twisting your wrist or arms in the event of a bind-up. If the bit jams or gets stuck, the clutch will slip instead of your wrist taking all the torque. This reduces the chance of sprains or strains while using the wrench.

Additionally, the SV12 has an LED light that illuminates the work area for improved visibility. Being able to clearly see helps avoid accidents and potential hazards while operating the tool.

For operator protection, the housing is made from a durable composite material that won't conduct electricity. This insulates you from potential shocks in case you accidentally contact live wires while working in tight spaces.

Overall, the safety features like the brake, clutch, LED light, and insulated housing make the Sealey SV12 a safer choice for demanding impact wrench applications. These built-in mechanisms help reduce fatigue and injury risk compared to tools lacking such safety provisions.

Ease of Use

The Sealey SV12 impact wrench is designed with ease of use in mind. Its compact size makes it very maneuverable in tight spaces, allowing you to access hard-to-reach fasteners. The tool has an ergonomic rubber grip that provides comfort and control when using it.

The variable speed trigger gives you precision control over the torque output. You can start off slow to get a bolt loosened, then increase speed to zip it off quickly. The forward/reverse switch is conveniently located for quick direction changes. An LED light illuminates your work area for better visibility.

Weighing only 2.4 lbs with the battery installed, this lightweight wrench reduces user fatigue during prolonged use. The balanced design prevents your hand from getting tired. Overall, the Sealey SV12 is an easy to handle and operate impact wrench suitable for automotive and light industrial applications.


The Sealey 12V SV12 Series 3/8" Impact Wrench Kit is very reasonably priced compared to similar models from other brands. At around £120-150, it offers great value given its power and performance.

Many competitors' cordless impact wrenches of comparable torque and features can cost upwards of £200 or more. So the Sealey represents a more budget-friendly option that still delivers professional quality and reliability.

When you consider you get two batteries and the charger included in the kit price, it's an even better deal. Additional batteries alone from some brands could cost £50-100 each.

Overall, the Sealey impact wrench gives you excellent bang for your buck. For DIYers or professional mechanics who don't want to spend a fortune but need a powerful and versatile tool, it's a very wallet-friendly choice worth considering.

The price-to-performance ratio offered by this Sealey model makes it stand out as one of the best value impact wrench buys currently available. You get pro-grade power and features without the premium price tag.

Pros & Cons

The Sealey 12V SV12 Series 3/8" Square Drive Impact Wrench Kit has several pros and cons worth considering:


  • Powerful torque of 240 Nm helps loosen even stubborn bolts
  • Brushless motor provides increased runtime and durability
  • Includes 2 lithium-ion batteries for continuous use
  • Charger features storage mode to maintain battery health
  • Lightweight and compact design increases maneuverability
  • Variable speed trigger gives more control over power
  • LED light illuminates dark work areas
  • Hardened steel hammer mechanism is durable
  • Comes with blow molded case for storage and transport


  • High price point compared to other 12V impact wrenches
  • Batteries take longer to charge than some competitors
  • Lacks accuracy needed for precision fastening jobs
  • Too underpowered for heavy duty applications
  • Not the quietest impact wrench when running at full power
  • Plastic battery housing feels flimsy and cheap
  • No fuel gauge on battery to indicate remaining runtime

More Information

Features of Sealey 12V SV12 Series 3/8" Sq Drive Impact Wrench Kit - 2 Batteries CP1204KIT
Part Number‎CP1204KIT
Power Source‎Battery-powered
Product Dimensions‎32 x 23 x 16 cm; 2 Kilograms
Voltage‎12 Volts
Batteries Included?‎Yes
Batteries Required?‎Yes
Battery Cell Type‎Lithium Ion
Included Components‎Impact Wrench Kit 3/8"Sq Drive 12V SV12 Series - 2 Batteries
Item Weight‎2 kg

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Material‎Aluminium‎Aluminium, Rubber‎METAL, PLASTIC‎Metal--
Product Dimensions‎38 x 13 x 27.5 cm; 2.57 Kilograms‎20 x 3 x 26.2 cm; 4.26 Kilograms‎24 x 34 x 15 cm; 2.23 Kilograms‎14 x 36 x 29 cm; 3.39 Kilograms--
Torque‎400 Newton Meters‎650 Newton Meters-‎230 Newton Meters‎220 Newton Meters‎220 Newton Meters
Voltage‎18-‎12 Volts‎20--
Batteries Included?‎No-‎Yes‎Yes‎No‎No
Batteries Required?‎No‎No‎Yes‎Yes‎No‎No
Battery Cell Type‎Lithium Ion-‎Lithium Ion‎Lithium Ion‎Lithium Ion‎Lithium Ion
Included Components‎Cordless Impact Wrench 18V 3Ah Lithium-ion 1/2"Sq Drive‎Cordless Impact Wrench 18V 4Ah Lithium-ion 1/2"Sq Drive‎Ratchet Wrench Kit 3/8"Sq Drive 12V SV12 Series - 2 Batteries‎Impact Wrench 20V SV20 Series 1/2"Sq Drive - 2 Batteries‎Cordless Impact Wrench 3/8"Sq Drive 10.8V 2Ah SV10.8 Series‎Cordless Impact Wrench 3/8"Sq Drive 10.8V SV10.8 Series - Body Only
Item Weight‎2.57 kg‎4.26 kg‎2.23 kg‎3.39 kg‎1.13 kg‎895 g

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