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      12-29-2012, 10:37 AM   #1
snowman81
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Battery Charger/Tender

Anyone have recommendations on a battery charger/tender? I've been looking into the the CTECK but there are many different models so I wanted to see what other people were using and how they liked them. Also, do I have to disconnect the batter from the car when I do this or can I use the terminals under the hood when I charge it. I have the white battery (I guess lead acid?) not the AGM battery.
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      12-29-2012, 10:45 AM   #2
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I have the CTEK 7002 and it seems to work well. You shouldn't have to disconnect the battery for just a charge or float, but if you're going to try the recondition cycle then you may want to consider it. I never really got an answer one way or another as to whether it was safe to run the recondition cycle from the underhood connections.
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      12-29-2012, 10:47 AM   #3
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i use ctek. love it
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      12-29-2012, 10:47 AM   #4
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CTEK 3300 is excellent and what I use constantly in the winter. In Canada can probably pick ir up on sale for 49.99.

Just charge via charge terminals in hood are the way to go. You actually hook up the connectors permanently with the islet looking hooks so when you need to charge it's two seconds for the quick connect connection.

If you search on here you will how to install the harness. Easy

Not sure about reconditioning.

BTW BMW sells a charger too. It's a relabeled CTEK 3300.
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      12-29-2012, 10:53 AM   #5
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BMW OEM battery charger I think made by the company battery tender.
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      12-29-2012, 10:54 AM   #6
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Batterytender.com
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      12-29-2012, 10:55 AM   #7
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I think I paid $72 with tax for it from my dealer. I am sure if you ordered from bavarian auto sport or turner Motorsport it would be a better deal with no tax.
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      12-29-2012, 10:56 AM   #8
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CTEK just added newer models, the old 3300 used to be the way to go, now you want the new 4.3, it is basically the new and improved 3300 for the same money with more features.

I have used a battery tender plus for 5 years as my car sits in the winter and a fair bit the rest of the year, it is still on the original October 2007 battery with no issues and all my motorcycles are in battery tenders also, but I think I would go ctek if I was getting a new one - seems be smaller, have more features and better indication of what it is doing.
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      12-29-2012, 11:01 AM   #9
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absolutely no complaints with this one, have used it for over a year now....

http://www.amazon.com/Battery-Tender...battery+tender
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      12-29-2012, 11:03 AM   #10
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Quote:
Originally Posted by BMW335icoupe View Post
BMW OEM battery charger I think made by the company battery tender.
The BMW battery charger in Europe is made by C-Tek.

Here is the C-Tek site from Sweden, showing you which car manufacturers use their chargers. Look at the bottom of the page.
http://www.ctek.com/se/sv/

Last edited by raj55; 12-30-2012 at 03:36 AM.
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      12-29-2012, 11:07 AM   #11
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Quote:
Originally Posted by raj55
Quote:
Originally Posted by BMW335icoupe View Post
BMW OEM battery charger I think made by the company battery tender.
The BMW battery charger in Europe is made by C-Tek.
Ok thanks. I should have specified the American one.
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      12-29-2012, 11:08 AM   #12
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This is what I have.

http://www.amazon.com/gp/aw/d/B003AP95O4
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      12-29-2012, 11:25 AM   #13
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BMW battery charger. I've been using it almost every day for 1 year now. No problems.
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      12-29-2012, 12:27 PM   #14
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I'm on my third 3-series and never used a battery tender. I typically leave my car at the airport or train station for a week at a time and never had an issue with a dead battery. What's the rule-of-thumb for using/needing a battery tender?
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      12-29-2012, 12:30 PM   #15
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For the CTEK tender, Which mode do you leave it on during operation? Car mode or the Winter/AGM mode?
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      12-29-2012, 12:30 PM   #16
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Unless you just like spending 4X for what you need (and of course we are driving Bimmers) get this for $19.00 :

http://www.walmart.com/ip/Schumacher...arger/13005742

Had mine for 2 years, it works flawlessly on BMW, S2000, and even detects the 6 Volt battery on my garden tractor

Last edited by laser; 12-29-2012 at 05:21 PM.
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      12-29-2012, 02:23 PM   #17
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Yeah, I like the CTEK MUS 4.3...and it's only a couple bucks more than the 3300 on amazon. Can you remove, recondition and then reinstall the same battery without going to the dealer to get it registered? And it seems like the easiest way to charge would be to connect the ctek to the terminals under the hood instead of leaving it in the trunk...thoughts? I know some people have said they do it, but is it a bad idea?
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      12-29-2012, 09:33 PM   #18
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Quote:
Originally Posted by Rmnelson12
For the CTEK tender, Which mode do you leave it on during operation? Car mode or the Winter/AGM mode?
Since I only use it in winter months, i use winter setting always. It's bloody cold here.
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      12-29-2012, 10:05 PM   #19
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It averages about 50 F here, winter mode ok to use?
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      12-30-2012, 02:06 AM   #20
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Quick noob question, will a regular recharge every now and then help my cold start up idles It does level down after 5 seconds or so anyway. (This is winter time, warmer season's it's fine.)
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      12-30-2012, 03:53 AM   #21
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Quote:
Originally Posted by Rmnelson12 View Post
For the CTEK tender, Which mode do you leave it on during operation? Car mode or the Winter/AGM mode?
If you read the user manual (Ctek 3.6), it says clearly winter mode for temp around -4 to +41 degrees F. That should answer your question. Sometimes people use the winter mode as a boost mode for a short time to start charging an old battery to force it into charge mode. I do not know if that is recommended by C-Tek. The thing I like about C-Tek is that it has desulfation effect, charge mode memory, goes into maintanance charge after full charge, and is a connect and forget device. It seems to be quite robust. Mine is 4 years old and once by mistake, I managed to drag it out of the wall socket and behind my car for atleast 50 meters before I realised my mistake. It is still running.

They have a new model that even analyses your battery and your generator but that is too expensive a toy for an ordinary car owner like myself! Besides that motivating another charger when the first one is working perfectly would be difficult.
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      12-30-2012, 12:26 PM   #22
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I have CTEK 3300 as well. When I used the first time, after about half an hour the device was hot so I unplugged. Is that normal? Is the device getting hot when charging? Thanks.
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