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 Post subject: Re: Flattened auxiliary battery - any consequences?
PostPosted: Fri Apr 24, 2020 10:54 am 
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Joined: Fri Apr 17, 2020 11:15 am
Posts: 9
If it's any help, Mitsubishi Assist arranged for the car to be taken away to the garage, and its subsequent repatriation back to us a couple of days later. I couldn't fault the service. We barely lifted a finger!


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 Post subject: Re: Flattened auxiliary battery - any consequences?
PostPosted: Fri Apr 24, 2020 3:11 pm 
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Thank you Derek.
Your comprehensive reply was very helpful. I will follow your advice.
I will also now check more regularly!

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 Post subject: Re: Flattened auxiliary battery - any consequences?
PostPosted: Sat Apr 25, 2020 1:10 am 
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Joined: Mon Dec 16, 2013 1:18 pm
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Location: Netherlands
DerekT wrote:
Thanks for the kind comment.

If you have a voltmeter, you can easily check the aux battery voltage from time-to-time at the jump-start terminal. It should be above 12V. If it drops below 11, put the car in ready for 1/2 hour, should bring it back to 12+.

Referring to my original post, I would have done exactly what you did, take the car for a warranty battery-swap,
but I couldn't find a dealer in my area that was open! I did call Mitsubishi Assistance; they came out, diagnosed a duff aux battery, but it wasn't an item that they carried. Ah well, have to wait 'til this crisis is over.
I'm sure that any battery service can replace your 12V battery. That shouldn't set you back more than 75 Euro equ.

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 Post subject: Re: Flattened auxiliary battery - any consequences?
PostPosted: Sat Apr 25, 2020 1:25 am 
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Mitsubishi say they’re >£500. The cheapest I could find the exact one for was on Amazon...£205


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 Post subject: Re: Flattened auxiliary battery - any consequences?
PostPosted: Sat Apr 25, 2020 1:28 am 
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Joined: Fri Apr 17, 2020 11:15 am
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Yuasa HJ-S46B24L(S) 12V 45Ah 325A GS Auxiliary AGM Battery https://www.amazon.co.uk/dp/B07F8Q3WGX/ ... OEb2ZEDR5G


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 Post subject: Re: Flattened auxiliary battery - any consequences?
PostPosted: Sat Apr 25, 2020 3:19 am 
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Joined: Mon Mar 12, 2018 2:18 am
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Location: Yorkshire end of M1, UK
There have been cases where the WiFi turns itself off after some time without use. In that case the car will not keep the 12V battery topped up automatically, so you will need to do it manually. If the WiFi is off, putting the car into full 'Ready' mode will turn it back on, but it may well turn itself off again after a while...

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 Post subject: Re: Flattened auxiliary battery - any consequences?
PostPosted: Sat Apr 25, 2020 3:24 am 
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Joined: Tue Sep 13, 2016 4:18 am
Posts: 19
Location: Staffordshire (UK)
Quote:
I'm sure that any battery service can replace your 12V battery. That shouldn't set you back more than 75 Euro.

Thanks, I found this , from a different thread on this forum:

https://www.tayna.co.uk/car-batteries/yuasa/ybx3053/

It costs £53, inc delivery.
It has identical dimensions, terminal config and capacity, although it is a wet battery, and not ideal
for fitting inside the cabin, rather than outside in the engine bay.

I got fed up with jump-starting, so I purchased the above and fitted it, as a temporary measure.
It is working fine, as you would expect.

But I shall be round to the dealer ASAP, to get the original replaced under warranty. I only purchased the car in February, 2 years old, replacing my MY14 Phev.
This car has low mileage (only 5K), but I see from the service history that it had only done 20 miles(!) in the last 12 months. This probably did not do the battery any good at all, and I feel that the dealership should have considered this possibility before they sold me the car.

Quote:
Mitsubishi say they’re >£500. The cheapest I could find the exact one for was on Amazon...£205


Thanks also for that info; I see no reason why Mitsubishi choose to fit such an expensive battery.


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 Post subject: Re: Flattened auxiliary battery - any consequences?
PostPosted: Sat Apr 25, 2020 6:04 pm 
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Location: Netherlands
I don't even believe that it is an expensive battery - just vastly overpriced.

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 Post subject: Re: Flattened auxiliary battery - any consequences?
PostPosted: Sun Apr 26, 2020 2:26 am 
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The Aux battery doesn't have the enormous current demands an ICE battery does, doesn't need a large capacity, so ought to be much cheaper.

But I don't know how much the sealed battery aspect impacts on the cost.

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 Post subject: Re: Flattened auxiliary battery - any consequences?
PostPosted: Sun Apr 26, 2020 7:21 am 
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Joined: Tue Aug 05, 2014 1:32 pm
Posts: 1998
Volume manufacturers gave up long ago on making money on new cars. Their profits come from spares which, with longer service intervals, last longer. You also have to remember that this battery is transported from the other side of the planet, so it is never going to be cheap. :roll:


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