Vehicle Storage - disconnect battery?

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Manufactured from 2004 to 2013

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Mujahid
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Vehicle Storage - disconnect battery?

Post by Mujahid » Thu Mar 15, 2018 11:14 am

Hi guys, some advice on vehicle storage.
I am leaving the country for about a month. So no major preparations required.
But I wanted to disconnect the battery and some-one advised that the key will "lose sync" if I do that??
Is this true? And what should do?

Thanks guys

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Toed64
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Re: Vehicle Storage - disconnect battery?

Post by Toed64 » Thu Mar 15, 2018 11:23 am

How good is the battery? My 135i once stood untouched for almost 6 weeks and all was fine without disconnecting the battery.

If your are concerned, a battery maintainer might be a good idea. I use an Optimate for my kit car that hibernates over the Winter.
2008 E81 130i
2010 E82 135i - now sold

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GeoffCollins
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Re: Vehicle Storage - disconnect battery?

Post by GeoffCollins » Thu Mar 15, 2018 11:25 am

Buy a trickle charger, very cheap and keeps the battery healthy :)
M135i (2014 Manual) - Custom Stainless Exhaust, JB4, BMS Intake, M4 LCA, Eibach Pro's, Cades Bern Wheels, Reiger Diffuser, Maxton Splitter, Double Slat Grills, M4 Mirror Caps

Mujahid
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Re: Vehicle Storage - disconnect battery?

Post by Mujahid » Thu Mar 15, 2018 2:11 pm

Is it a problem to disconnect the battery?
Transport mode?
Dont really want to use a trickle charger

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Barney McGrew
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Re: Vehicle Storage - disconnect battery?

Post by Barney McGrew » Thu Mar 15, 2018 2:52 pm

I don't see why disconnecting would be such a bad thing.

Put it this way, if the battery dies, it's had the same effect as disconnecting anyway and you then also probably have a damaged battery to replace.

Jfk
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Re: Vehicle Storage - disconnect battery?

Post by Jfk » Thu Mar 15, 2018 4:53 pm

Computers don't like being without power , yes they have tiny memory backup batteries that can and will keep the data that's been acquired but , why stress these little power cells and risk problems..
Just trickle charge every now and again or keep it on a conditioner if I were you.
Only my opinion though 👍
2010 135 i Coupe in Black

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Barney McGrew
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Re: Vehicle Storage - disconnect battery?

Post by Barney McGrew » Thu Mar 15, 2018 5:08 pm

I should probably clarify my initial post - I personally think a tender is the best way, but I was coming from the perspective if you have no other option and can't use a tender which will result in a flat battery, then a disconnect is probably better.

I read you're follow up post saying you'd 'rather not' use a tender, which sounds like you could if you wanted too. If this is the case definitely use a tender :)

Mujahid
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Re: Vehicle Storage - disconnect battery?

Post by Mujahid » Thu Mar 15, 2018 6:27 pm

Thanks for the inputs guys, probably gonna get someone to start it up once a week.
Was hoping for a simple plug (or connect 😁) and play

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Toed64
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Re: Vehicle Storage - disconnect battery?

Post by Toed64 » Thu Mar 15, 2018 7:08 pm

A friend of mine goes back home to Australia every year for up to 6 weeks. He has an old Passat and I've told him to disconnect the battery before he goes because its alarm system drains the battery over a period of about 3 weeks and a totally flat battery with a permanent power drain will be killed off.

It is better to disconnect the battery than allow it to run dead flat. As stated above, it will have the same effect anyway.
2008 E81 130i
2010 E82 135i - now sold

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0l0dom0l0
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Re: Vehicle Storage - disconnect battery?

Post by 0l0dom0l0 » Thu Mar 15, 2018 9:47 pm

Mujahid wrote:
Thu Mar 15, 2018 6:27 pm
Thanks for the inputs guys, probably gonna get someone to start it up once a week.
Was hoping for a simple plug (or connect 😁) and play
Totally unnecessary.

Just leave it for a month. If the battery is flat when you get back, jump start it. But it won't be.
2007 130i LE - BMWP Exhaust, Strut Brace, Air Filter, Short Shift kit and Handbrake.
B12 KIT with M3 LCA and TS.
Plus Cruise Control, Digital Speedo, CDV Delete, Camber Pin Mod, OEM LED Numberplate Lights, Brighter Non-dimming OEM Angel Eyes.

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