Posts: 2220
Joined: Tue Aug 05, 2014 1:32 pm

Re: Replacement 12v battery

Tue Jan 05, 2021 12:29 am

Small caveat - the daily charging does not happen in base model Gx3h because it doesn't have wifi :lol:

Posts: 285
Joined: Mon Aug 15, 2016 10:43 am
Location: Forres, Scotland, UK. 2014 GX4h with clear rear light lenses.

Re: Replacement 12v battery

Thu Jan 07, 2021 8:19 am

I once managed to flatten the auxiliary battery on my PHEV which also resulted in the wipers going (when they weren't switched on) and absolutely nothing else working at all - not even the hazards. I've had similar experiences with the new Ford Kuga PHEV - the 12v battery goes flat within a few weeks if not used. On the Ford the rear lights sometimes flash rapidly and the stereo speakers can make a thumping noise. The Ford battery (located under the boot floor, similar to Mitsubishi) can be re-charged from connectons in the engine bay, although if the battery is flat you can't open the passenger door which in turn makes it very difficult to open the bonnet latch!

In the case of the Ford Kuga, if the 12v battery is so flat that it won't charge from a battery charger, it can be done by placing a jump pack on to the battery connections (in the engine bay) and then the charger on to the jump pack. However, I've only done this on new Kugas with new 12v batteries that have gone flat. Might not work on an old, flat battery. Also I'll have to say 'Disclaimer!' don't try this at home kids, as this procedure might not be suitable for a Mitsubishi, and might blow it up or set it on fire, or something.

Posts: 19
Joined: Sun Apr 07, 2019 5:00 am

Re: Replacement 12v battery

Fri Jan 08, 2021 5:47 pm

littlescrote wrote:
Mon Jan 04, 2021 2:22 am
AntsCar wrote:
Thu Dec 31, 2020 7:55 am

I don't think the 12v battery is charged when the car (drive battery) is plugged in. Instead it seems to charge like any normal ICE car, when the petrol engine is running.
Wrong. There is no 12V alternator on the ICE, it's only charged by DC-DC converter off the drive battery when in Ready mode, when charging and once a day at 2pm if the Wifi module is enabled.
Thanks, that's good to know 👍

Is the WiFi enabled all the time or only when the car is connected to the mains? I'm not always plugged in at 2pm

Posts: 577
Joined: Tue Jan 12, 2016 6:37 am
Location: Bucks

Re: Replacement 12v battery

Sat Jan 09, 2021 1:50 pm

The WiFi (not fitted to all models) is on all the time.
GX4h (2016) since 23/12/2015

Posts: 4
Joined: Sat Nov 10, 2018 5:35 am

Re: Replacement 12v battery

Sun Jan 10, 2021 3:07 am

Hi All,

I have a 2016 Gx5h where I have never touched anything to do with the Wifi.

To clarify, will my phev automatically charge the 12v battery everyday at 2.00 or, must I configure something, somewhere to arrange for this to happen and if so, can somebody tell me what?

Many thanks

Posts: 223
Joined: Fri Jul 26, 2019 3:52 am

Re: Replacement 12v battery

Mon Jan 11, 2021 8:22 am

If you don't have a device registered to the WiFi module, it will go to sleep and not initiate the daily 14:00 Aux battery charging schedule.

Posts: 19
Joined: Sun Apr 07, 2019 5:00 am

Re: Replacement 12v battery

Tue Jan 12, 2021 7:39 am

ChrisMiller wrote:
Sat Jan 09, 2021 1:50 pm
The WiFi (not fitted to all models) is on all the time.

Posts: 1
Joined: Fri Feb 05, 2021 3:43 am

Re: Replacement 12v battery

Fri Feb 05, 2021 3:51 am

That’s good to know antscar that kwik fit do the battery as we have the same issue. Phoned in to the dealer this morning and they said they would have to order it in and would cost around £250. Then give it an hour they ring back and say no it will cost around £650. Whooh! They said the battery has come to the end of its life at around 6 years. They have to reprogram certain things due to canbus. I think I’ll give kwikfit a call.

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