Discharged 12 volt battery

[KeithS]

Probably a bit silly of MG to put the MG3 battery in the boot then.

Amusingly the handbook says the battery is under the bonnet!!

 

[Noel]

I suppose that any connection to the neg and pos on the battery

If the 12 V battery is flat, then my understanding is that you use the power pack to get the ignition going, run the car for 30 minutes to put some charge back then limp home with minimum electricals running.

Once home trickle charge the 12 V battery in the boot with a full sized grown up charger that can assess is health at the same time. At this early stage in the battery’s life it should fine and not need replacing. The battery in my Golf lasted ten years and you soon know the end is nigh because it doesn’t hold a charge.

By power pack, I assume you’re referring to a small battery to connect to the cars 12V battery, and not to the main traction battery.
Most hybrids need the 12V supply to power the system, so that you can switch it on.
My neighbour, goes away a lot, he has called out the AA twice, when his 12V battery was flat. I suggested he bought a CTEC battery charger, to charge and maintain the battery when he’s away, result no more problems.

 

[Noel]

Amusingly the handbook says the battery is under the bonnet!!

No comment

 

[Noel]

I have never ever had a charger that was worth the trip to buy it, they seem to last for one or two charges then die on me, even more expensive ones, so I'm hoping the new tech will work around that and just start stuff.

Get a CTEC charger/ maintainer they are expensive but good.

 

[Big Ears]

I have one for the camper.

https://amzn.eu/d/0Z5s96N

but got this for the car, it lives in the camper so when I get home it's fully ready to boost the car.

https://amzn.eu/d/0Z5s96N

 

[Italy]

I've got this one



Ali

 

[krzycho]

I had this complete discharge of my 12V battery in November.
I charged it overnight and it's fine now.

 

[moff1956]

Hello, I would like to have information on the problems of a discharged 12 volt battery, which causes the vehicle to be immobilized.... Many MG3 owners have had this problem.

Is there a fix applied by MG so that this no longer happens?

We have a year-old MG3 petrol with battery trouble : discovered a large, parasitic draw from the radio/control panel - in excess of 1 amp!

 

[emmrecs]

@moff1956

Welcome to the forums for MG Electric Vehicles!

Since you own the older MG3 Petrol (as does my wife) I am not certain that the circumstances in which your battery problem occurred will be the same or similar for owners of the newer MG3 Hybrid+. Clearly, the technology in the later model is considerably different to that in yours.

However, your situation may well provide some ideas for owners of the Hybrid MG3.