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  • Can I fit a larger battery to my car to counter stop/start issues? 14 Aug 2025 (Ask HJ)
    To beat the dreaded short journey issue with stop start batteries is it worth putting a bigger capacity battery on my Fabia or will it upset the charging...
  • Vauxhall Combo 1.3 cdti - Car Battery isolator - positive or negative post? 19 Feb 2025 (Forum)
    They also mentioned the switch should be closer to the battery, rather than inside the cab (cables around 2m but size/capacity was recommended by the supplier).  Don't want to damage my new battery, so should I switch the isolator to the positive circuit, or relocate it closer to the battery?
  • Can storing a hybrid for several months damage the batteries? 17 May 2023 (Ask HJ)
    My son is thinking of buying a Toyota Yaris Cross which may be left in storage for some months at a time. No electric supply will be available. Can this...
  • How long will the battery last in a Honda Jazz Hybrid? 27 Apr 2022 (Ask HJ)
    I'm thinking of buying a new Honda Jazz Hybrid. My only concern is the lifespan of the batteries powering the motors. I intend to keep the car for 10 or...
  • How should I protect the battery in my hybrid during lockdown? 2 May 2020 (Ask HJ)
    How would one protect the batteries in a plug-in hybrid (PHEV) during a prolonged period off the road, three to six months - for example? Is there a suitable...
  • Can I trickle charge a hybrid car? 31 Mar 2020 (Ask HJ)
    You recommend trickle charging on a hybrid during self-isolation. We've got a Kia Niro, but I couldn't find visible battery terminals. Any idea where they...
  • If I change the battery in my BMW does it need to be reprogrammed? 9 Oct 2019 (Ask HJ)
    I have a 2012 BMW 520d. The battery is the original and would not start the car after not being used for two weeks. It's fine when I use the car regularly....
  • Is my power steering failure down to a low battery? 7 Jan 2019 (Ask HJ)
    My power steering has failed.The power steering warning light has not come on but the battery warning light is on now constantly. Is the power steering...
  • Why am I getting a battery charge failure warning light in my Rover 75? 4 Jul 2017 (Ask HJ)
    I'm having battery charge problems with my Rover 75 CDTi. I get dashboard warnings that all go away when you charge the battery, but return twenty miles...
  • Peugeot 307 - Battery Light stays on when Ignition is off 18 Jan 2011 (Forum)
    Help!!   I'm having to disconnect the battery everytime I leave my car because instead of everything shutting down as it should my battery light stays on along with the centre dash.  If left, the battery drains.  I've checked the alternator and it seems to be charging the battery ok... any suggestions greatly recieved!!
  • The battery in my Ford Mondeo is only showing 12.3V - what's wrong? 15 Sep 2017 (Ask HJ)
    Recently, the fan belt, tensioner and battery light came on in my 2004 Ford Mondeo. I had belt and tensioner replaced, but battery light still. I checked...
  • How long do electric car batteries last? 6 Aug 2017 (Ask HJ)
    How long do electric car batteries last?
  • Renault clio - confusion on Start stop Batteries 23 Sep 2022 (Forum)
    For the last month, The warning light is on the start and stop, So good chance that the battery is on its way out since the car is now over 5 years old Looking at new batteries, Its so confusing when looking on buying a battery, Take for instance euro car parts, Put in my reg number and gives me a range of batteries  One that stands out is the Bosch S5 Car Battery 096 with a 50% discount code , Yah , I guess its never been at full price, But starts that its not stop start but yet looking on another site alpha-batteries, It states in the description    S5A08 12V 096 Stop Start Car Battery by Bosch Bosch S5 High Performance AGM™ Batteries provide excellent charge acceptance & peak power for vehicles with start/stop systems There are other sellers saying its not suitable for stop start, Any advice will be welcomed  Thanks  Malc 
  • peugeot 308 2008 Vti 1.6 petrol - 308 battery 6 Jul 2020 (Forum)
    We have a 308 2008 1.6 vti petrol. it hasn't been driven for a few months and lights, battery, dash, locking are all dead no sound when turning over, nothing at all. I was wondering this seems like a battery dead problem. So i was going to buy a 027 battery to give it a go.
  • Can trickle chargers be used on hybrids? 3 Apr 2020 (Ask HJ)
    Can a trickle charger be used with cars that don't have a separate 12-volt battery?
  • What happened to solid state batteries for EVs? 29 Jan 2020 (Ask HJ)
    What happened to solid state batteries? They were going to transform electric cars, with full charging times in minutes?
  • Is it safe to connect a battery to a 'smart' mains charger all winter? 1 Nov 2016 (Ask HJ)
    I see that you replied to Brian Joslin's question "Is it safe to connect a battery to a 'smart' mains charger all winter" in the negative, but I thought...
  • Car in storage - How can we prevent the battery going flat? 22 Jun 2016 (Ask HJ)
    My wife's Honda CR-Z is often left standing in the garage for long periods. What would you suggest we buy for keeping the battery fully charged?
  • Ford Focus - Types of Calcium Battery 21 Jul 2014 (Forum)
    I'm  looking to get a new battery for my focus saloon 1.8 petrol  (reg 2000) I know it  takes a calcium battery; but some batteries are not just calcium they are silver calcium.  Is there a difference or is it just labeling?
  • Charging a battery 20 Nov 2004 (Forum)
    Flat battery on my Herald... I realise this is basic, but how long should I leave my battery on charge? It is a 40ah battery and the charger on low setting reads 3 amps. Does this mean I should leave it on for 13 hours?
 

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