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Second battery?
Posted: Sat Apr 27, 2024 1:58 pm
by JakeS76
I don't have a driveway so no way to charge my battery. So would it make sense to buy a second battery then swap them over every month so that one can be charged while the other is in the car? I don't use the car that often so don't want to be stuck with a flat battery.
As you can't open the boot once the battery is removed (for charging)I thought this might be a good solution. I do have the ski hatch though. But it sounds like this is a very awkward way to access the boot catch?
Second battery?
Posted: Sat Apr 27, 2024 2:05 pm
by Reamesy
If your new battery is good and the car has no issues then it should start no problem after a month
Second battery?
Posted: Sat Apr 27, 2024 2:05 pm
by B21
The issue is that with ever swap you then need to re-register the battery..a bit off faff..
You could take the battery out and lock the car manually..
Then manually unlock the car..pop the bonnet..momentarily use the jump connector to give power to release the boot then re-attach battery etc..
Obviously fraught with f€£k up issues..
Second battery?
Posted: Sat Apr 27, 2024 2:06 pm
by B21
Reamesy wrote: ↑Sat Apr 27, 2024 2:05 pm
If your new battery is good and the car has no issues then it should start no problem after a month
Battery is good for 6 weeks but relies on it being fully charged to start with..
Second battery?
Posted: Sat Apr 27, 2024 9:43 pm
by JakeS76
I've got the BimmerLink app so it's only a couple of minutes to re-register the battery each time. But if you keep doing this does it screw up the electronics?
Second battery?
Posted: Sat Apr 27, 2024 10:08 pm
by flybobbie
Why not drop solar panel in window and run to battery.
All you need is something pushing electrons the right way around.
100w panel for £50.
Second battery?
Posted: Sat Apr 27, 2024 10:11 pm
by Mr Tidy
Solar panel sounds like a good idea, but the easiest option might be to just use the car a bit more often and get more fun out of it!
Second battery?
Posted: Sat Apr 27, 2024 11:27 pm
by Pondrew
JakeS76 wrote: ↑Sat Apr 27, 2024 1:58 pm
I don't have a driveway so no way to charge my battery. So would it make sense to buy a second battery then swap them over every month so that one can be charged while the other is in the car? I don't use the car that often so don't want to be stuck with a flat battery.
As you can't open the boot once the battery is removed (for charging)I thought this might be a good solution. I do have the ski hatch though. But it sounds like this is a very awkward way to access the boot catch?
Sounds like a good idea to me. Don't see an issue with multiple re-registering.
If you buy a duplicate of the existing one, I am not convinced you would need to keep re-registering them, either.
Bit of a ball-ache keep lugging heavy batteries around, though.
Second battery?
Posted: Sun Apr 28, 2024 7:54 am
by Big Andra
flybobbie wrote: ↑Sat Apr 27, 2024 10:08 pm
Why not drop solar panel in window and run to battery.
All you need is something pushing electrons the right way around.
100w panel for £50.
This is what I do with my van as it can sometimes sit for a couple of weeks without turning a wheel. It works a treat.
Second battery?
Posted: Sun Apr 28, 2024 9:02 am
by DonDon
B21 wrote: ↑Sat Apr 27, 2024 2:05 pm
Then manually unlock the car..pop the bonnet..momentarily use the jump connector to give power to release the boot then re-attach battery etc..
Just to reiterate - the battery is always charged via the red terminal in the engine bay (near the windscreen) and a ground connection, not via the boot.
Second battery?
Posted: Sun Apr 28, 2024 12:07 pm
by MarshMA10
Solar panel solution works really well for motorbikes in my experience! In your shoes this is what I’d do. Or, lend the keys to a pal once a month! That’s what I used to do with the Vette.
Second battery?
Posted: Tue Apr 30, 2024 1:54 am
by javis20
I would avoid frequently disconnecting and reconnecting the battery option. In my experience the FRM module doesn't like it. and can be killed. It's not an inexpensive item. Just run a cable from the house to the car and bring it up under the car to the terminals in the bonnet. Make it a ground fault outlet and it will be safe.
Second battery?
Posted: Tue Apr 30, 2024 7:03 pm
by B21
javis20 wrote: ↑Tue Apr 30, 2024 1:54 am
I would avoid frequently disconnecting and reconnecting the battery option. In my experience the FRM module doesn't like it. and can be killed. It's not an inexpensive item. Just run a cable from the house to the car and bring it up under the car to the terminals in the bonnet. Make it a ground fault outlet and it will be safe.
Second battery?
Posted: Thu May 09, 2024 12:05 pm
by JakeS76
Thanks everyone. My car isn't parked where I can run a cable to it, so either driving it more often or getting a solar trickle charger looks the best option.
Would an AA solar charger that plugs into the OBD2 socket work ok?