Swap your McLaren battery out for an lead acid type

The standard Lion batteries for all McLaren models are expensive (with a lot of suppliers ripping people off on costs) and subject to long delays. Avoid all that (if you really need a new battery) by swapping out to a standard lead acid one. Needs some programming with a proper diagnostic tool but all of our dealers (New Zealand, Munich, Boston, Scottsdale) can do it as can any McLaren dealer.

[@davebegbie362]

Love your videos but The sound quality is terrible.

[@jesvans]

i agree, difficult to understand

[@simonbishop6041]

Does the CTEK trickle charging regime still apply John? Just wondering if the rate at which the lead acid one loses charge is similar to the Lithium one? asking for a friend just in case its a really stooopid question :-)

[@jonathancollard3710]

TBH… I leave all my cars on trickle…Ferrari and Lotus. Also my GR Yaris…. Basically any car that isn’t regularly used… lead iron or Lithium.

[@bobxher9542]

Could you also replace it with a non McLaren lithium ion or other lightweight battery and just turn off the „battery monitor function as described?

[@ThorneyMotorsport]

Dont see why not, but weve not tested that yet.

[@jonathancollard3710]

Just to add to the tail of woe that is high performance car main dealer (rip off) service. My Ferrari is in at the moment. Left it there two weeks ago as they “were very busy’ even though I’d booked it in October 🤨… they then call me and say “lots of low battery faults, we need to test the unit at cost of £125”…. To which I said, nope you are having a laugh, a new one (which that unit is) only cost about £90…. Needless to say, the list of none Maintenance Schedule items that are only “advisory items for a car this age but still need doing” (i.e. not included in their 7 years pre-paid maintenance plan) was quoted at £3,500 …. 😡 . Hummm, off to the local specialist for that lot then… 🤓 So it’s not just Macca main dealers that take the piss…

[@mikewhalen5049]

Is the McLaren lithium battery a lifepo4 or nmc chemistry?

[@mjakacupi]

Which battery can I put in? But I can buy only classic AGM battery. With which power can I change it? It's for 570s 2017. Thanks for video!

[@staninator8827]

How much does the Alfa battery cost Thorney?

[@ThorneyMotorsport]

That was just what we had lying about, any 12v battery will work but does need some mix and match in terms of size, we are developing a universal bracket to enable you to use any 12v

[@quaidmciver172]

I’m on my 3rd lithium ion battery in 5 months. My 12C only wants to charge the battery when the rpm is 3k and above. There are no codes showing on the diagnostics. At idle speed the voltage dips down and the battery eventually goes flat. I live 3.5 hours from the nearest Mclaren dealer. I purchased used 720S alternator and I’m starting to believe that the second 720S alternator isn’t any good. Maybe I should buy a brand new alternator and try it.

[@ThorneyMotorsport]

That's an alternator problem not the battery

[@quaidmciver172]

@@ThorneyMotorsport thanks John, I’ll be placing a order for a new alternator with Tom first thing in the morning.

[@jesvans]

@@ThorneyMotorsport do those alternators have a "trigger" from the computer ?

[@jesvans]

did you fix it ?

[@quaidmciver172]

@@jesvans I did. It was my alternator. I had two bad alternators. I should’ve purchased a brand new one from the start. Car runs just fine with a brand new alternator now

[@彡Ŧợ彡]

Hi! I have a problem with the roof, windows, and sometimes PCC fault on my mclaren 650s . These problems have any link with the battery because i changed the original battery . Check engine is on too

[@ThorneyMotorsport]

if you have a check engine light on then you'll need to see what that is, PCC wont be battery related, window might, roof unlikely.

[@彡Ŧợ彡]

So the original battery doesn’t need to work all functions? I'm spending so much on this car🥲

[@Biasi7]

I need this. Have a 570S battery went flat, and threw BMS fault and stalk fault and indicator faults with it. Bought a brand new battery from Mclaren ($4,000)… worked for about a month and threw the codes again …. Bought an emulator thinking that would work, but the faults are still there. I’m from Texas. Does the vehicle need to be present? Or can you do it remotely?

[@ThorneyMotorsport]

If the car drives fine but just has the fault codes then a lot will go away after a few ignition cycles. The rest will need the diagnostic kit (MDS or other). Iur dealer in Scottsdale maybe able to help, that's the nearest we have at the moment. Drop me an email and I will see what can be done. Keep the old battery, chances are it's fine

[@CyberDM-oo2my]

Ricardo, did you buy the McMedics emulator? Did you try removing it?

[@CyberDM-oo2my]

The service bulletin looks like it applies to the 12c - can you do this on a 570S?

[@ThorneyMotorsport]

Yes, we've done it on our own 570 as a test

[@CyberDM-oo2my]

@@ThorneyMotorsport wow, that's amazing! I'm going to try this on my 570 but with a non-OEM lithium battery - any recommendations?

[@ThorneyMotorsport]

@@CyberDM-oo2my make sure you match the same specs as the OEM one in terms of power, the details are here: www.thorneymotorsport.co.uk/change-your-battery-on-your-mclaren/

[@salimsopari]

Is there anyone in Canada who can reprogram my 12c to accept the lead acid battery?

[@ThorneyMotorsport]

We have a dealer in Toronto: www.thorneymotorsport.co.uk/find-local-mclaren-dealer/foreign-automotive/

[@hotelguy78]

Is there a way to do it on the 720s?

[@ThorneyMotorsport]

Yes it's the same

[@hotelguy78]

@@ThorneyMotorsport mc medics said it's only on the p11 cars which doesn't include the 720s. Are they incorrect?

[@jasonlewis3820]

LOL just let mine run flat ...now thrown up loads of faults my local McLaren in brum quoted 2700 for a new battery fitted if mine is F**d i`ll buy a old school one and bring the car down to you to re program rather you make a few ££ then them robbing Ba**ards...at the moment i`ve got it to take a charge so fingers crossed...

[@ThorneyMotorsport]

Really doubt it needs a battery, just charge direct to the battery terminals and that will recover it most likely

[@SuperWayneyb]

🤘😎🤘