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E36/7 Z3 (1996-2002)
E36/7 Z3 Roadster, Z3 coupe, Z3 M Roadster and Z3 M Coupe talk with our gurus here.

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  #1  
Old 03-25-2010, 08:29 PM
330indy 330indy is offline
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Location: Indianapolis
 
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battery tender for storage

how many of you guys/gals keep your car tendered with a battery tender?
it feels great to start it up after 3 months of sleep, and it springs to life
love it
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  #2  
Old 03-25-2010, 08:54 PM
SUNZOUT SUNZOUT is offline
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yep - schumacher - around $25 from Walmart.
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  #3  
Old 03-25-2010, 09:18 PM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by 330indy View Post
how many of you guys/gals keep your car tendered with a battery tender?
it feels great to start it up after 3 months of sleep, and it springs to life
love it
My tender is on the car in the garage year round.
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  #4  
Old 03-26-2010, 05:40 AM
bhurley bhurley is offline
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I had mine on the deltran battery tender plus for the winter. It snapped right over.
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  #5  
Old 03-26-2010, 06:16 AM
Vinci Vinci is offline
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Is there any reason that a battery tender shouldn't be left inside the cabin/trunk while charging? A friend parks their coupe in a parking garage, and it would be better to not have the tender itself left in the open.
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  #6  
Old 03-26-2010, 06:26 AM
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Ron Stygar Ron Stygar is offline
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Originally Posted by Vinci View Post
Is there any reason that a battery tender shouldn't be left inside the cabin/trunk while charging? A friend parks their coupe in a parking garage, and it would be better to not have the tender itself left in the open.
If it fails and gets on fire.
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  #7  
Old 03-26-2010, 06:36 AM
wired wired is offline
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My car may not be used for 3 to 4 days every week so i want something quick and simple to plug and unplug.

How about that tender that BMW sells that goes into the lighter... is that any good?
I'd rather not open the trunk and lift up stuff so that lighter tender looks pretty simple.

For the Schumacher tender from Walmart is there any other way to connect it without all the hassle of going into the trunk?
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  #8  
Old 03-26-2010, 06:38 AM
SUNZOUT SUNZOUT is offline
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It does come with quick connect kit to hard wire it but I just use the terminals in the engine compartment.
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  #9  
Old 03-26-2010, 06:41 AM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by Vinci View Post
Is there any reason that a battery tender shouldn't be left inside the cabin/trunk while charging? A friend parks their coupe in a parking garage, and it would be better to not have the tender itself left in the open.
I forget the details but a Z3 got on fire under the hood using a tender.
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  #10  
Old 03-26-2010, 06:47 AM
Vinci Vinci is offline
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Quote:
Originally Posted by Ron Stygar View Post
If it fails and gets on fire.
Quote:
Originally Posted by Ron Stygar View Post
I forget the details but a Z3 got on fire under the hood using a tender.
That's one of the big ones that had come to mind. I may just help them secure it to the car somehow. Maybe some coated cable or the like.
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  #11  
Old 03-26-2010, 07:04 AM
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inTgr8r inTgr8r is offline
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^ I'm going to look at an external connector for mine.
I'll probably pick up connections from the engine compartment terminals.

I'd prefer to keep the tender out of the car.
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  #12  
Old 03-26-2010, 07:07 AM
jman1975 jman1975 is offline
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I get mine out of storage in a week...we'll see if the tender worked for the last 6 months
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  #13  
Old 03-26-2010, 07:32 AM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by inTgr8r View Post
^ I'm going to look at an external connector for mine.
I'll probably pick up connections from the engine compartment terminals.

I'd prefer to keep the tender out of the car.
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  #14  
Old 03-26-2010, 07:35 AM
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inTgr8r inTgr8r is offline
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Thanks Ron
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  #15  
Old 03-26-2010, 09:54 AM
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Terry J. Harris Terry J. Harris is offline
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Quote:
Originally Posted by wired View Post
My car may not be used for 3 to 4 days every week so i want something quick and simple to plug and unplug.

How about that tender that BMW sells that goes into the lighter... is that any good?
I'd rather not open the trunk and lift up stuff so that lighter tender looks pretty simple.

For the Schumacher tender from Walmart is there any other way to connect it without all the hassle of going into the trunk?
I've had the BMW tender for years, as I purchased originally for use with my Z3. Living in Wyoming I may go a month or even months not driving the roadster, so the tender was a necessity. The BMW tender is quick and easy, plugging into the car's cigarette lighter. I now use it also on my Z4 and even on my X3. I was a non-believer as to the need for it with the X3 until Wyoming went through its gawd-awful fall/winter this past year with constant temps down around single digit or worse. I often walk to work so even my X3 can go for days without being driven. Got in the X3 after a week+ of those temps and just sitting, tried starting it up and it barely started, and the clock and all similar items needed resetting. Talked to the BMW folks and they told me use the tender also on the X3. So now whichever one is not being driven gets put on the tender.
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  #16  
Old 03-26-2010, 03:35 PM
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WINDonSKIN WINDonSKIN is offline
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Will be taking the cover off tomorrow and firing her up for the first time since nov. I have one on the harley also. It turned over 2 times and rumbled so will see how the roadster does.
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  #17  
Old 03-26-2010, 08:31 PM
wired wired is offline
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Quote:
Originally Posted by Terry J. Harris View Post
I've had the BMW tender for years, as I purchased originally for use with my Z3. Living in Wyoming I may go a month or even months not driving the roadster, so the tender was a necessity. The BMW tender is quick and easy, plugging into the car's cigarette lighter. I now use it also on my Z4 and even on my X3. I was a non-believer as to the need for it with the X3 until Wyoming went through its gawd-awful fall/winter this past year with constant temps down around single digit or worse. I often walk to work so even my X3 can go for days without being driven. Got in the X3 after a week+ of those temps and just sitting, tried starting it up and it barely started, and the clock and all similar items needed resetting. Talked to the BMW folks and they told me use the tender also on the X3. So now whichever one is not being driven gets put on the tender.
Nice man, yeah i think ill go with the plug in lighter one. It's the best fit for what i need.
Thank you for the post.
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  #18  
Old 03-28-2010, 02:23 PM
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Pinecone Pinecone is offline
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BMW is the same as this: http://batterytender.com/automotive/...-at-1-25a.html

But with BMW logo and higher price (got to pay for the logo).

If you are just not driving for a few days or even a few weeks, you don't need one (or at least, you shouldn't need one). We have one on our Roadster over the winter, as it can go months without driving.
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  #19  
Old 03-28-2010, 05:44 PM
captaineddie captaineddie is offline
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I use one that came from Harbor Freight [only $5.00] and it has worked great.
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  #20  
Old 03-28-2010, 11:01 PM
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phrider phrider is offline
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Quote:
Originally Posted by captaineddie View Post
I use one that came from Harbor Freight [only $5.00] and it has worked great.
Given my experiences with Harbor Freight electrical and electronics, I definitely wouldn't leave that in or near my car.
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  #21  
Old 03-28-2010, 11:23 PM
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Ron Stygar Ron Stygar is offline
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Quote:
Originally Posted by phrider View Post
Given my experiences with Harbor Freight electrical and electronics, I definitely wouldn't leave that in or near my car.
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  #22  
Old 03-29-2010, 07:04 AM
Bill_R Bill_R is offline
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Mein Auto: 2003 Z4 3.0
I bought a cheap knockoff, supposed to be "intelligent", battery maintainer in the fall of 2008. I hooked it up to the battery in November and looked forward to a happy battery in the spring. In March I had a dead battery that had been boiled dry!

This past winter I just hooked up my regular charger for a day or so every month. I gave the "intelligent" unit to my son to keep his motorcycle battery up to snuff, with warnings to not leave it hooked up.

It seems that not all of these maintainers are created equal.
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  #23  
Old 03-29-2010, 04:55 PM
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Pinecone Pinecone is offline
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There is a REASON I recommend the Battery Tender and Battery Minder.

My Battery Minder has been on me generator battery for over 5 YEARS.
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  #24  
Old 03-30-2010, 02:14 AM
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bob lindquist bob lindquist is offline
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Tender

How about 8 years on the original battery! Thats from using the Battery Tender.
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  #25  
Old 03-30-2010, 05:22 AM
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inTgr8r inTgr8r is offline
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+1 for Battery Tender
I wouldn't use anything else.
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