DB9 battery removal

[trosley]

I am struggling trying to remove the battery on my 2011/12 DB9. Have removed the lid to reveal the battery. I have undone the two bolts to the black battery retention bracket at the rear of the battery and it appears to slide up a only few cm since it is restricted by another silver coloured bracket that holds in in to position. I haven't taken the terminals off yet but I can't see how, with the retention bracket in place but lifted, can the battery be removed. Do you just tilt the battery backwards with the bracket loose?

Secondly, if I attach a battery charger or power source to the booster bolt and earth under the bonnet, or the power socket in the boot, will this retain all the memory settings whilst I change over the batteries or am I being unnecessarily paranoid and re booting the settings is a simple procedure?

Any helpful advice will be gratefully received.

[Beechburn]

Does this help - I'm not sure of differences in MY

https://aston1936.com/2017/04/14/changing-the-batt...

[DB531]

If the links work all will be revealed.

https://www.pistonheads.com/gassing/topic.asp?t=17...

https://www.youtube.com/channel/UCA6ybjxT4EPuScdFw...

After I had replaced the battery and reconnected it I left the car for a while (had a cup of tea) with the doors open and when I came back to reset the seats and windows I was unable to move the seat either forwards or backwards.
On checking the workshop manual I found that you can only move the seats when the interior light is on, this I should mention was for the early models, might be different on the later models.
The shutting of all doors and then opening one resolved the problem and resetting the seats and windows was completed.

[trosley]

Thank you both for your rapid replies. I am not by the car at the moment but I am sure I will find the answers with the links that you have given. I didn't realise that you could remove the battery box, so will explore that possibility next week.

Thanks again

[a98pmalcolm]

I need to be doing a battery change next week.

Is it possible to hook up a battery booster back to the positive connection in front of the engine so setting will not be lost?

[westhumbler]

Worth having a look at the videos posted by this chap in the US - he's done some specifically on battery removal, replacement and re-setting the systems.

https://www.youtube.com/channel/UCA6ybjxT4EPuScdFw...

There was also another thread on pistonheads earlier this year that has some further useful info:-

https://www.pistonheads.com/gassing/topic.asp?h=0&...

Hope you get it sorted OK

[bullet7]

Not sure if it is the same on the DB9 but when I went to change the battery on my 911, I connected up the Ctek charger through the cigarette lighter socket to give it a constant supply even when the battery was disconnected and this saved all the settings. You have to be careful that the positive lead does not touch any part of the bodywork once disconnected - I wrapped mine in rubber

[pynhead]

Just changed the battery in my 2011 Rapide. I used my CTEK charger in "supply" mode while i changed out the battery. All settings remained intact. I'm not certain if the standard charger that comes with your car has that mode or if the "charge" mode will also work?

[a98pmalcolm]

pynhead said:

Just changed the battery in my 2011 Rapide. I used my CTEK charger in "supply" mode while i changed out the battery. All settings remained intact. I'm not certain if the standard charger that comes with your car has that mode or if the "charge" mode will also work?

Hi, did you hook the C-Tek charger to the positive connection in the engine bay?

[pynhead]

a98pmalcolm said:

pynhead said:

Just changed the battery in my 2011 Rapide. I used my CTEK charger in "supply" mode while i changed out the battery. All settings remained intact. I'm not certain if the standard charger that comes with your car has that mode or if the "charge" mode will also work?

Hi, did you hook the C-Tek charger to the positive connection in the engine bay?

I had it connected via the power socket in the "boot"

[trosley]

A very big thank you to everyone. With all your help my battery has now been removed, the new one in place and everything back together, as good as new. As a bonus, all of the settings have been retained.

[Ken Figenus]

pynhead said:

Just changed the battery in my 2011 Rapide. I used my CTEK charger in "supply" mode while i changed out the battery. All settings remained intact. I'm not certain if the standard charger that comes with your car has that mode or if the "charge" mode will also work?

This is on my to do list too as I sense it weakening - same year as yours. Did you upgrade to an AGM battery? Is it exact same part as DB9? Rich Redpants actually does a DB9 bracket to fit a smaller battery in to save 15Kg - every little helps

[a98pmalcolm]

Generally no need to go AGM, They are for stop/start cars and you will be paying more money.

I'm fitting a Bosch S5 onto mine tonight. £118 delivered from a reliable seller on e-bay.

[Ken Figenus]

Malcolm - her shampoo costs far more than the missus's 'because she's worth it' big brand shampoo! I'm hardly going to skimp on a battery Good to know its overkill mind as the battery seems quite weak on them - hasn't ever run the B&O for more than about 10-15 mins without 'low battery' warnings...which is a pain as the shampoo and set takes me well over an hour!

[a98pmalcolm]

lol nice reference

But a Bosch S5 is certainly not a skimp lol... Its one of the more premium batteries on the market. And with a 5 year warranty.

You will see them for £250+ at your local motor factor.
But its a matter of shopping around and there will always be a better price out there.

I work in the trade ordering batteries pretty oftern and an AGM is near on pointless on these. AGM is aimed for the stop start cars like the more modern Audi's..

It would be like fitting a boost controller onto a car without a turbo.. It will serve no purpose..

But I fitted mine tonight and I think it could be worth mentioning a few things to help people in the future.
Mine is a 2007 DB9.

I did not need to remove the octopus junction box to remove the battery clamp (mine did look slightly different to Aston 1936 on youtube, I think he has a earlier DB9)

I placed a C-Tek charger on the positive terminal on the junction box by simply clipping off a plastic cover. And the negative clamp onto the stud holding the negative cable.
I used a small thick plastic bag to wrap around the positive terminal so it wont short on the cars body while removing the battery.

Placed the new battery in, bolted the battery clamp, fitted the terminals, removed the C-Tek charger and done.
All settings remained and nothing lost

Hope can help anyone in the future..

Edited by a98pmalcolm on Thursday 30th August 00:09

[trosley]

a98pmalcolm said:

lol nice reference .
I did not need to remove the octopus junction box to remove the battery clamp (mine did look slightly different to Aston 1936 on youtube, I think he has a earlier DB9)

I placed a C-Tek charger on the positive terminal on the junction box by simply clipping off a plastic cover. And the negative clamp onto the stud holding the negative cable.
I used a small thick plastic bag to wrap around the positive terminal so it wont short on the cars body while removing the battery.

Placed the new battery in, bolted the battery clamp, fitted the terminals, removed the C-Tek charger and done.
All settings remained and nothing lost

Edited by a98pmalcolm on Thursday 30th August 00:09

Mine is a late 2011 DB9 Le Sport Coupe and has a battery box that is so tight it doesn't allow any movement for getting the battery out. Once I found out that the battery case could be undone (thanks again Pistonheaders) I was able to slide the battery box away enough to allow the battery to be clear of the holding bracket and lift out. Like you Malcolm, I didn't need to remove the junction box and I also covered the positive terminal in a plastic bag but I plugged the C-Trek charger into the input in the boot. Funilly enough, the bit I was dreading the most was liting a heavy battery upwards and out and then back in whilst leaning into the rear seats through the driver's door. In the event, lifting the battery was a really simple operation and nothing to worry about but I did take the precaution of covering the back of the driver's seat with a cushion in case I accidentally dropped it! Finally, a tip that I picked up on watching one of aston1936.com's video was using a wire extension to poke through the battery breather hole in the floor. Without doing this it would have been impossible to route the breather pipe through the hole in the floor with the battery in position and I really don't think that I would have ever thought of such a simple solution