Dead battery

[Taffy]

Hi there,
My Stinger GT hasn’t been driven for 2.5 months and it wouldn’t start the other day. I have managed to jump start it, drove it for a couple of hours and then turned the car off. It wouldn’t start again. I have a trickle charger which may help to fix the issue, but I’m not altogether sure how to connect the crocodile clips to the battery, which I’ve found in the boot. Is it just as simple as connecting the red leads to the positive and the black to the negative or do you have to connect the negative to somewhere other than the battery itself? I am trying to avoid buying a new battery.
Thanks for your help.

 

[D.J.]

Is it just as simple as connecting the red leads to the positive and the black to the negative or do you have to connect the negative to somewhere other than the battery itself? I am trying to avoid buying a new battery.
Thanks for your help.

Yes it is that easy.... But .. you may still need a new AGM battery shortly.

You can do their in either the trunk (direct to battery) or under the hood using the jump start terminals.

 

[D.J.]

If it helps...

Here from the manual.
#1 and #4 are what you and to connect to (or connect directly the battery in the trunk - same thing)

 

[JSolo]

I left my battery tender connected under the bonnet. Too much hassle to get at the battery in the boot. In fact, just looked at it this afternoon after being hooked up for over a day. Per kill-a-watt meter, it's consuming ~2-3 watts.

I got one of these - https://www.costco.com/battery-tend...charger-%26-maintainer.product.100679769.html

Depending on the condition of the battery, you may be able to revive it by leaving it on trickle charger if the issue is not physical battery damage. How many amps is it?

Batteries for these cars are not cheap either, ~$200 USD iirc.

 

[Taffy]

Thanks for your replies. I actually connected the trickle charger last night for about 12 hours, but attached it to the jump start terminals under the bonnet. I was told that this wouldn’t work and should be connecting directly to the battery in the boot instead.

 

[D.J.]

I was told that this wouldn’t work and should be connecting directly to the battery in the boot instead.

Who told to that?

The jumper connections under the hood are directly connected to the battery - there isn't even a fuse. It's a direct connection with no electronics or switches

 

[Taffy]

Well, believe it or not, a breakdown guy who came to look at it!!! OK, seems that I used the trickle charger correctly then. In that case, I think I needs myself a new battery!!

 

[D.J.]

Well, believe it or not, a breakdown guy who came to look at it!!! OK, seems that I used the trickle charger correctly then. In that case, I think I needs myself a new battery!!

If you drove the car, with its 165amp alternator, for 2 hours, and it would not restart after that. (And assuming nothing else is busted) - I to would lean towards the battery being defective/worn out.

I would get the battery tested though to be sure. The AGM battery's used in nearly all modern vehicles with auto stop technology, are quite pricey

 

[Taffy]

Thanks. Actually, our cars don’t have auto stop. I have ordered a new battery at a cost of AUD 220, which is about USD 160. Are they easy to fit yourself?

 

[D.J.]

Thanks. Actually, our cars don’t have auto stop. I have ordered a new battery at a cost of AUD 220, which is about USD 160. Are they easy to fit yourself?

Yes, with very basic hand tools, it's a simple quick job.

I believe a 10mm and 12mm socket is all that is required.

 

[Taffy]

Thanks DJ.
The current battery has a vent hose…not sure whether the new replacement battery will have one. I assume if it does, then I just reconnect the hose to the new battery. Is it possible that the new battery will not have a vent hose connection? If so, do I just get rid of the hose itself?
Cheers.

 

[killinghall]

I charged my battery via the hood shortly after collecting the car. Took about 6.5 hours.

 

[Aarvix]

AGM batteries really don't like to fall below a certain voltage and can be hard to bring back to life if that happens.

I was able to revive mine by connecting it in parallel with another battery to get the voltage to a point that my charger actually worked. This is potentially dangerous and requires that you have another fully charged battery handy.

How do I bring my battery back from the dead?

help.summitracing.com

 

[cncBilly]

As owning a sailing yacht gives one great experience with batteries since they are your life when at sea or when swinging off the hook for days on end. With that said this is where I would chime in and give a dissertation on battery charge and the dangers and consequences of allowing them to drop to low voltage. However since the OP has order a new battery and has the situation under control I will spare you all from my drivel. Cheers

 

[D.J.]

Thanks DJ.
The current battery has a vent hose…not sure whether the new replacement battery will have one. I assume if it does, then I just reconnect the hose to the new battery. Is it possible that the new battery will not have a vent hose connection? If so, do I just get rid of the hose itself?
Cheers.

If it were me, I would want the new battery to have that same vent.

Hopefully it's a 1:1 match

 

[JSolo]

@OP How old is the battery in question? Do you drive lots of short trips, car goes unused for lengths of time?

 

[Taffy]

Hi,
Yes, mainly short trips tbh. Rarely do more than 30 miles in one go.
I’m not quite sure whether the current battery is an AGM..is there a way to tell other than if it says AGM on it?
I have just noticed that the new battery that I have just reserved at the store appears to be a non AGM battery, but when I put my registration number in, this is the one it recommended.

 

[Taffy]

And btw, the car will be 4 years old in May, so the battery is around that age. Also, the car is generally used most days but for fairly short trips. This time, I was away for 2.5 months, so it just didn’t get used.

 

[JSolo]

I wouldn't say 30 miles is a short trip. Short trips IMO is not getting the car up to operating temp and keeping it there for at least 20-30 min.

4 Years is a reasonable life span of a battery. No idea what year your car is. Mine says agm somewhere on it. Pretty sure it's agm for all years for the US market. UK might be different. Check your trunk to see what the current battery says. Don't rely on a parts catalog. Or call your dealer.

 

[ChaneRZ]

Just change your battery. I hard wire my Noco cable in the back. I hate opening and closing the hood just to charge the battery.