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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, 04:57:28 PM   #11
e46lsb
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Default Re: Best battery tender?

Quote:
Originally Posted by Obioban View Post
It does. 7 lbs, no hassles







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.


Thank you for your help on this. So if I order it, in essence itís kinda complete? Where does the comfort connect plug inv
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Old Tue, Nov-21-2017, 04:58:14 PM   #12
Dirty Elf
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Default Re: Best battery tender?

Quote:
Originally Posted by Obioban View Post
It does. 7 lbs, no hassles



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.
Interesting on the li-ion battery. Do you have a link to more info?

Any idea what the upgraded models of the CTEK chargers provide? They appear to be the same electronics repackaged at a higher price.

MSX5.0 vs MUS7002 vs MUS25000

perhaps charging rates?

edit: yep. 4.3A vs 7A vs 25A
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Old Tue, Nov-21-2017, 05:39:46 PM   #13
Obioban
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Default Re: Best battery tender?

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Originally Posted by e46lsb View Post
Thank you for your help on this. So if I order it, in essence it’s kinda complete? Where does the comfort connect plug inv
Wherever you want-- you wire it in (if you choose to use it).

Quote:
Originally Posted by Dirty Elf View Post
Interesting on the li-ion battery. Do you have a link to more info?

Any idea what the upgraded models of the CTEK chargers provide? They appear to be the same electronics repackaged at a higher price.

MSX5.0 vs MUS7002 vs MUS25000

perhaps charging rates?

edit: yep. 4.3A vs 7A vs 25A
I'm running a Braille GU1R.

https://www.summitracing.com/parts/brl-gu1r

I would suggest making sure you don't have any power draws, as the capacity is less than stock. That said, I have no issue parking the car for a week and having it fire right up. It also has had zero trouble firing up the car in cold temperatures. I've had it for ~3 years now. If I'll be parking it for more than a week, I connect it to the ctek lithium.

One of the things I really like about it is it will cut the power to the supply to the car if you leave it sitting long enough (not charging) that it has discharged-- the benefit of that is you can't discharge it to the point that you damage it. The CTEK Lithium can disengange the discharge lock when you connect it by holding the mode button for 10 seconds.

It's a bit pricey, but Lithium Poly batteries are supposed to last >2x as long as standard batteries, and it's around 2x the cost. So, long term, the cost shouldn't be more-- especially since I can't break it early by accidentally discharging it, like conventional batteries.

Looks like the actual weight is 6.4 lbs

One of my winter projects this year is to relocate the battery to the drug bin under the hood. My battery is light enough that it's not doing anything consequential for weight distribution, and the battery cable that runs to the rear of the car weights 8 lbs by itself-- more than my entire battery
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Old Tue, Nov-21-2017, 05:43:18 PM   #14
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Default Re: Best battery tender?

What is the weight on the mini cooper battery that is so popular as a weight reduction item? And for that matter what is the weight of a stock battery?

I'm probably due for a replacement. Have had mine for ~5 years...
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Old Tue, Nov-21-2017, 05:47:03 PM   #15
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Default Re: Best battery tender?

I've heard CTEK's are great battery chargers. I'm currently using a Battery Tender if the M3 sits for more than a few days. I wired up the terminal adapter to the battery and ran it out under the side cover so it's easy to plug in. I bought a $10 LED Volt meter off eBay and mounted it on the side of the tray. Works great.





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Old Tue, Nov-21-2017, 06:10:36 PM   #16
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Default Re: Best battery tender?

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Originally Posted by Dirty Elf View Post
What is the weight on the mini cooper battery that is so popular as a weight reduction item? And for that matter what is the weight of a stock battery?

I'm probably due for a replacement. Have had mine for ~5 years...
According to realoem:
M3 battery: 42 lbs
Mini battery: 34 lbs

Quote:
Originally Posted by WOLFN8TR View Post
I've heard CTEK's are great battery chargers. I'm currently using a Battery Tender if the M3 sits for more than a few days. I wired up the terminal adapter to the battery and ran it out under the side cover so it's easy to plug in. I bought a $10 LED Volt meter off eBay and mounted it on the side of the tray. Works great.





CTEK offers a similar thing, but unfortunately it doesn't work with the Lithium charger



or

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Last edited by Obioban; Tue, Nov-21-2017 at 07:04:18 PM.
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Old Tue, Nov-21-2017, 06:21:31 PM   #17
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Default Re: Best battery tender?

+1 on CTEK. I use the 4.3A (


).
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Old Tue, Nov-21-2017, 06:42:52 PM   #18
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Default Re: Best battery tender?

this seems an appropriate thread... what are a few recommended battery replacements? (non-li-ion) or what would be the specs to look for? Does a lead AGM battery benefit from a charger like the CTEK with its desulfation process?
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Old Tue, Nov-21-2017, 06:57:31 PM   #19
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Default Re: Best battery tender?

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Originally Posted by Dirty Elf View Post
this seems an appropriate thread... what are a few recommended battery replacements? (non-li-ion) or what would be the specs to look for? Does a lead AGM battery benefit from a charger like the CTEK with its desulfation process?
Here are some good threads to browse.
http://www.m3forum.net/m3forum/showthread.php?t=552358
This one has the mini battery comparsion: http://m3forum.net/m3forum/showthread.php?t=153047

Desulfation by its nature is to break up the lead sulfate crystals and reduce them (I don't think it eliminates). With the cycle CTEK has for desulfation should def help.
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Old Tue, Nov-21-2017, 07:14:58 PM   #20
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Default Re: Best battery tender?

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Same.
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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)