Röhr DFX-40 Portable Battery Charger 4 Amp 6V / 12V


(10 reviews)
  • 12 Month Warranty – Free to Call UK Based Technical Support Line
  • Turbo and Trickle Charge – For charging the car, bike, boat, HGV or smaller battery units
  • Pulse Battery Repair / Maintain Technology – Your battery will last longer and you can repair batteries that no longer hold a charge
  • Weather Resistant – Designed for use in tricky situations
  • Automatic Easy to Use – Connect and charge with live progress reports from an LCD display

Whether it’s charging a motorbike battery or a HGV, there’s a Röhr for the job and a Röhr for you!

Have a question? Contact our friendly, expert Röhr qualified staff here


Expected in stock: 30/05/2021

Available on back-order


| Highly Advanced to Charge Almost Any Battery

Röhr battery chargers are built to last with high quality components and the latest technology to deliver unparalleled performance. With advanced power circuit design, you get superior efficiency from a compact, light unit with an IP65 weather resistant body. This charger outputs a single-phase DC current and will charge nearly all leisure, automotive vehicle and domestic batteries.

| Charging With Confidence

Convenient, reliable and portable, with advanced circuit protection keeping your battery safe from surges and over-charging. Insulated heavy duty clamps ensures a safe and secure connection from the long reach 1 metre cables.


    • Input Voltage: 240V
    • Output Voltage: 6/12V
    • Charging Current: 1.5A, Power: 24W
    • Battery Type: AGM, GEL, WET
    • Charging Type: 9 Step
    • Overload and Overcharge Protection
    • Weight: 630 (g)
    • Dimensions: 109 x 85 x 50 mm

In The Box

  • 1 x Battery charger
  • 2 x 1 metre Clamps (built in)
  • 1 x Instruction manual
Nine Stage Charging Battery Charger

| Nine Stage Charging

“Connect and forget” with full auto charging you can rely on. The advanced micro processor controlled nine stage cycle takes care of business and lets you know when it’s time to hit the road again. Winter mode ensures steady charging in even the most extreme conditions.

| Overload and Surge Protection

Using the latest integrated circuit protection, charge with confidence knowing you and your battery are safe from the risk of over charging or power surges. Select the current and battery type manually or simply let the auto memory function remember where you left off.

DFX-40 Intelligent Battery Charger

| Pulse Battery Repair Technology

Older batteries can lose their ability to hold charge due to becoming sulfated. This charger features highly advanced pulse rectifier boost battery repair technology that actively repairs this damage. This battery restoration feature can get almost any battery back to full health.

Customer Reviews

10 reviews for Röhr DFX-40 Portable Battery Charger 4 Amp 6V / 12V

  1. Geoff Shellswell

    Worked well straight out of the box.  Diagnosed a faulty battery, confirmed by local garage.  Compact unit. Arrived quickly. 

  2. Graham Lewis

    Works Great, doing what I wanted it to on my VW T5

  3. Mick

    I bought this DFX-40 battery charger and it’s a great piece of kit. It is compact, very easy to use, with easy to follow instructions. It works exactly as described and I’m extremely pleased with it. Saved me having to buy a new battery!

  4. Peter Butler

    Tried the DFX-40 on my old battery that I had left over winter in
    a spare car, so it never got charged during that period.
    When I came to start the car the battery was completely dead.
    Overnight on the DFX-40 the reconditioning brought it back to life.

  5. Piotr Berger

    Excellent product, express shipping.

  6. brianwood748

    Excellent product and first-class service from Union Mart. Thankyou so much.

  7. Robert Rebbitt

    Great product and super fast delivery, ordered on sunday and delivered by 10am tues what better service could you ask for.

  8. John Phair

    Ordered this charger through e bay. Very pleased with quality of item. Delivery was almost unbelievably quick. Highly recommend this company.

  9. Paul Marshall

    Brilliant product delivered on time thank you.

  10. R.snooks

    Good piece of kit,easy to use and recharged dead battery no problem

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