RAC 6/12V Automatic Battery Charger740/2168


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RAC 6/12V Automatic Battery Charger with short circuit & reverse polarity protection. Suitable for 6/12Volt lead acid car & motorcycle batteries. Automatically maintains battery at full charge. Initial charge time up to 10 hours. Max petrol engine size 4000cc – Max diesel engine size 3500cc.

Initial charge time up to 10 hours.

  • Suitable for petrol engines up to 4000cc and diesel engines up to 3500cc.
  • Batteries with a capacity of 7 - 180Ah.
  • Charge time up to 10 hours.
  • Reverse polarity indicator.
  • Short circuit protection.

300 reviews

Overall rating (4.6)

Ease of use
BazaarVoice TrustMark
5 / 5

Well worth the money

As soon as you feel the weight you begin to expect quality and you are not disappointed. Absolutely flat to fully charged and the car (2 litre diesel) started in 4 hours is some going. The meter is a useful aid to monitoring progress as well. Decent length of cable and long leads too mean that this is worth the additional costs compared to rivals.

2 / 5

RAC 12V Car Battery Charger.

I got one of these battery charges when it was needed after leaving the internal lights on. Which totaly discharged my car battery. But this unit WOULD NOT WORK due to the safty cut outs. This unit though my battery was damaged as it was only reading 0.72v. Thanks to a friend who had an old style battery changer, my battery was full charged. But this RAC 12V Car Battery Charger, just would not work.

4 / 5

Its OK

I had I knackered battery and the overload circuits failed on the charger. Nearly cooked it. Otherwise it does what it says on the tin. For a few quid more, there are much better products out there. I'm a heavy user, so more critical than others. I charge 180 ah batteries three times a week, every week, so its working continuously at its limit. For its size, it feels beefy, and delivers a strong current to flat truck batteries, that it fully charges within 12 - 18 hours. I recommend it for car owners/domestic use, otherwise look elsewhere.

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Questions & answers

29 questions | 33 answersAsk a question
Any good with a leisure battery?

Hi. I need a charger to charge and maintain a 110ah caravan leisure battery, and am wondering if anyone out there uses one of these chargers for this purpose. Thanks in advance

1 Answer

This charger is perfect Hugh! Use it myself for exactly the same reason. Set it up on the trickle charge setting and leave it connected for 24hrs and you'll be back on the road. Happy camping!


How do you charge the unit?

1 Answer

Hi Joanie

The unit runs off mains electric so you do not need to charge it up. Remove the battery from the car that you wish to charge, attach to the charger, plug into the mains and away you go.

Have a nice day.


Does this battery charger work on gel and agm batteries found in most bmws from 2008 onwards with stop start technology?

1 Answer

Hi there,

Gel batteries have a lower full rate charge voltage to prevent from overheating and possible seal breakage.

Therefore GEL batteries should only be charged with battery charges specifically manufactured to charge this type of battery.

This particular product would not be suitable.

Thanks for using Argos Q&A.

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Boring but important info

Prices correct as displayed but are subject to change.

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