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E46 M3 (2001-2006) Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006.


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Old Tue, Nov-21-2017, 02:55:21 PM   #1
werfer
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Default Best battery tender?

With the weather getting worse Iím finding that Iím driving the M less and less. Iím not looking to completely store it for the winter but I want to get a battery tender as it sits for a couple weeks at a time sometimes. Whatís the best battery tender for this purpose?
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Old Tue, Nov-21-2017, 03:00:35 PM   #2
Chapelle
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Default Re: Best battery tender?

I've got this one, works great.



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Old Tue, Nov-21-2017, 03:01:50 PM   #3
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Default Re: Best battery tender?

Do you hook it up directly to the battery or to the terminals in the engine bay?
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Old Tue, Nov-21-2017, 03:02:53 PM   #4
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Default Re: Best battery tender?

http://www.cabelas.com/product/Batte...B&gclsrc=aw.ds

I've had one for 4 years on my e36 that I keep parked in the winter. Works great.

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Old Tue, Nov-21-2017, 03:03:49 PM   #5
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Default Re: Best battery tender?

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Originally Posted by werfer View Post
Do you hook it up directly to the battery or to the terminals in the engine bay?
Either but I connect mine under the hood.

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Old Tue, Nov-21-2017, 03:08:20 PM   #6
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Default Re: Best battery tender?

I have one of the battery minder branded ones. it was on the M3 for 18mos caring for it, and had no problems once I went to start it. I've also used it to charge a dead mower battery.
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Old Tue, Nov-21-2017, 03:17:17 PM   #7
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Default Re: Best battery tender?

CTEK makes the best out there. They're also great for battery rejuvenation, if you accidentally discharge it.

You can attach it at the front of the car, the rear of the car (to the battery directly), or to the cigarette lighter. They also include a dongle you can attach to your car permanently wherever you want, if it's frequently stored for long periods (or if you have a tiny battery). I've added it to my M3 since it was retired from daily driver status (in fact, the M3 has its own dedicated CTEK charger, as they make one specific to lithium ion batteries).




CTEK, rebranded with BMW logos, is actually the battery tender that BMW sells at their dealerships.
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Last edited by Obioban; Wed, Nov-22-2017 at 06:32:12 PM.
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Old Tue, Nov-21-2017, 03:40:31 PM   #8
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Default Re: Best battery tender?

Quote:
Originally Posted by Obioban View Post
CTEK makes the best out there. They're also great for battery rejuvenation, if you accidentally discharge it.

You can attach it at the front of the car, the rear of the car (to the battery directly), or to the cigarette lighter. They also include a dongle you can attach to your car permanently wherever you want, if it's frequently stored for long periods (or if you have a tiny battery). I've added it to my M3 since it was retired from daily driver status (in fact, the M3 has its own dedicated CTEK charger, as they make one specific to lithium ion batteries).

https://www.amazon.com/CTEK-56-864-A...&keywords=ctek
Your M3 has a Li-ion battery?
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Old Tue, Nov-21-2017, 03:44:22 PM   #9
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Default Re: Best battery tender?

Quote:
Originally Posted by Obioban View Post
CTEK makes the best out there. They're also great for battery rejuvenation, if you accidentally discharge it.

You can attach it at the front of the car, the rear of the car (to the battery directly), or to the cigarette lighter. They also include a dongle you can attach to your car permanently wherever you want, if it's frequently stored for long periods (or if you have a tiny battery). I've added it to my M3 since it was retired from daily driver status (in fact, the M3 has its own dedicated CTEK charger, as they make one specific to lithium ion batteries).

https://www.amazon.com/CTEK-56-864-A...&keywords=ctek


I want to get this. What accessories would you recommend to complete the system with the best setup?
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Old Tue, Nov-21-2017, 03:56:07 PM   #10
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Default Re: Best battery tender?

Quote:
Originally Posted by Dirty Elf View Post
Your M3 has a Li-ion battery?
It does. 7 lbs, no hassles

Quote:
Originally Posted by e46lsb View Post
I want to get this. What accessories would you recommend to complete the system with the best setup?
Depends how you want to use it.

Here's all their options:
https://smartercharger.com/accessories/

It comes with a "comfort connect", which is all I've ever needed. I have one installed on each car.
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Discussing Best battery tender? in the E46 M3 (2001-2006) Forum - Engine: S54 - Max Hp: 333 hp at 7,900 rpm / 262 lb/ft at 4,900 rpm
Total Produced: 45,000+ - Years Produced: 2001 to 2006. at BMW M3 Forum.com (E30 M3 | E36 M3 | E46 M3 | E92 M3 | F80/X)