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      02-06-2016, 12:07 AM   #89
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Somebody like Ctek needs to invent a portable battery booster charger. Basically a deep cycle battery with a brain, that can act as a tender for a car without AC power nearby. Hypothetically it would last for light duty service for 60-90 days before it's "spent" and would need a recharge, all the while protecting the main car battery. Perhaps it sits in the trunk for security?
Even if it cost $150 it might be worth it to some to maintain an already expensive AGM type battery for example
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      02-06-2016, 02:23 PM   #90
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Quote:
Originally Posted by 330indy View Post
Somebody like Ctek needs to invent a portable battery booster charger. Basically a deep cycle battery with a brain, that can act as a tender for a car without AC power nearby. Hypothetically it would last for light duty service for 60-90 days before it's "spent" and would need a recharge, all the while protecting the main car battery. Perhaps it sits in the trunk for security?
Even if it cost $150 it might be worth it to some to maintain an already expensive AGM type battery for example
I would buy a product like this in a heartbeat.
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      02-06-2016, 07:03 PM   #91
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+1 on the Deltran battery tender Jr.
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      02-07-2016, 07:04 AM   #92
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I have mine connected directly to the battery...works perfectly
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      02-19-2016, 08:06 AM   #93
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Quote:
Originally Posted by 330indy View Post
Somebody like Ctek needs to invent a portable battery booster charger. Basically a deep cycle battery with a brain, that can act as a tender for a car without AC power nearby. Hypothetically it would last for light duty service for 60-90 days before it's "spent" and would need a recharge, all the while protecting the main car battery. Perhaps it sits in the trunk for security?
Even if it cost $150 it might be worth it to some to maintain an already expensive AGM type battery for example
Just stumbled upon this product:

https://www.indiegogo.com/projects/l...et-on-the-go#/

Wonder how long it would run a Battery Tender Jr. before needing to take it inside for a recharge, which they say only takes 3hrs.
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      03-14-2016, 10:11 PM   #94
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What about the type that just plugs into the cig adapter
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      03-15-2016, 09:24 AM   #95
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Quote:
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What about the type that just plugs into the cig adapter
What about it?
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      04-08-2016, 01:14 PM   #96
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I picked up a CTEK 4.3 from Amazon. I have it hooked up to the jumper points under the hood. It took about a day and a half for a full charge. So far so good.
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      04-11-2016, 09:56 PM   #97
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Quote:
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What about it?
Is it bad to charge thru the cig adaptor?
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      04-12-2016, 06:23 AM   #98
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Quote:
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Is it bad to charge thru the cig adaptor?
I don't see why it would be bad, but connecting under the hood or directly to the battery would be preferable.
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      06-28-2016, 01:17 AM   #99
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Quote:
Originally Posted by monterey
Quote:
Originally Posted by Iyzmi View Post
What about it?
Is it bad to charge thru the cig adaptor?
The new cars' do not have active cig plugs without ignition.
Under hood connections are recommended in the manual.

The newest BMW tenders are a version of the CTEK4.3 but with a new Li-Ion charge mode for new M cars and motorcycles.
AGM batteries now get charged under the normal car mode.
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      06-28-2016, 08:09 AM   #100
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Quote:
Originally Posted by Iyzmi View Post
Last winter I had mine plugged into a Battery Tender Jr with no issues. Same thing I use for my motorcycle batteries. Only difference I'm aware of is that it's 750mAh rather than 1.25A but this didn't change the end result for me. The Plus model is probably a safer bet but Jr works just fine too.

However, this year my car is stored in my condo's underground garage with no access to an electrical outlet. I was debating whether to pull the battery out of the car or just leave the negative terminal unplugged. Decided I didn't want to deal with pulling it out so I'm taking my chances and just leaving it unplugged. We'll see what happens when I fire it up after 3 months of sitting disconnected. Hoping for the best but I may end up having to jump start it. If it doesn't work out this year I plan on pulling the battery out next year. We'll see I guess...
My car typically resides in storage for 6 months per year. Winter before last I did not have an electrical outlet so went the route of disconnecting the negative terminal. Upon reconnection 6 months later, my car started first time, just an FYI. I am now back on the battery tender (for last winter), and have always used the battery tender religiously, I might be tempting fate here, but my battery is 5+ years old now and is still performing well (I have used the battery tender since day one, except for two winters where I had to disconnect the negative terminal.

PS: I use the Deltran and connect under the hood, I have left the connecters that come with the Deltran under my hood permanently and route the connecter toward the front of the engine bay and thread it under the support above the headlight with no ill effects.
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      06-28-2016, 09:07 AM   #101
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Quote:
Originally Posted by radiofrequency View Post
My car typically resides in storage for 6 months per year. Winter before last I did not have an electrical outlet so went the route of disconnecting the negative terminal. Upon reconnection 6 months later, my car started first time, just an FYI. I am now back on the battery tender (for last winter), and have always used the battery tender religiously, I might be tempting fate here, but my battery is 5+ years old now and is still performing well (I have used the battery tender since day one, except for two winters where I had to disconnect the negative terminal.

PS: I use the Deltran and connect under the hood, I have left the connecters that come with the Deltran under my hood permanently and route the connecter toward the front of the engine bay and thread it under the support above the headlight with no ill effects.
I didn't have access to an electrical outlet this last winter either. Disconnected the battery for about 4 months. Reconnected in spring and the car started up instantly. So yeah, a battery tender is not 100% necessary but still a good idea.
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      06-29-2016, 08:16 AM   #102
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Quote:
Originally Posted by Iyzmi View Post
I didn't have access to an electrical outlet this last winter either. Disconnected the battery for about 4 months. Reconnected in spring and the car started up instantly. So yeah, a battery tender is not 100% necessary but still a good idea.
Pretty remarkable how this method works! I will add to my original comment that the temperatures where my car was stored were in the 40F range, so not the best environment for a battery.
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      12-17-2016, 03:08 PM   #103
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So what's the consensus here, charge our AGM batteries with the normal or snowflake mode for long winter storage (3+ months)? I just hooked up my new CTEK 7002 and put it on snowflake mode but want to make sure that's the correct one to use for our AGM batteries.
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      12-17-2016, 04:43 PM   #104
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Originally Posted by Spoolin1 View Post
So what's the consensus here, charge our AGM batteries with the normal or snowflake mode for long winter storage (3+ months)? I just hooked up my new CTEK 7002 and put it on snowflake mode but want to make sure that's the correct one to use for our AGM batteries.
# 19 => http://www.m3post.com/forums/showthr...1#post20997691
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      11-26-2017, 09:59 PM   #105
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Great to hear that the pics are useful ! THX
For further questions feel free to shoot me PM....anytime
What does the 7000 model buy you that the 3300 doesn't?
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      11-27-2017, 04:59 AM   #106
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What does the 7000 model buy you that the 3300 doesn't?
I think the CTEK 3300 is also good . It's smaller and cheaper than the 7000.
But I think the 7000 will charge faster .
More info you can find on the CTEK website...

=> https://smartercharger.com/products/...multi-us-3300/

=> http://www.ctek.com/
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      11-27-2017, 07:11 AM   #107
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Quote:
Originally Posted by ///M Power-Belgium View Post
I think the CTEK 3300 is also good . It's smaller and cheaper than the 7000.
But I think the 7000 will charge faster .
More info you can find on the CTEK website...

=> https://smartercharger.com/products/...multi-us-3300/

=> http://www.ctek.com/
Does this matter if I'm only using it as a trickle charger for winter?

What other accessories do you recco? I've seen a bluetooth interface so you can monitor your battery from your smart phone.
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      11-27-2017, 06:06 PM   #108
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Quote:
Originally Posted by carenthuziast View Post
Does this matter if I'm only using it as a trickle charger for winter?

What other accessories do you recco? I've seen a bluetooth interface so you can monitor your battery from your smart phone.
No worries . You're fine with your CTEK 3300 during the whole winter .
I use mine always with my central connector . Only one click and I charge in 10 sec. My central connector is connected permanent with the O-rings on the poles from my battery. And it stays there .
My CTEK came with the central connector , it was one kit.
I don't use it with bluetooth or smart phone . I keep it simple , because I know CTEK does the job like it should be (smart charge)
And of course CTEK prolongs the lifetime from every battery !
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      11-29-2017, 08:13 PM   #109
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I recommend the Battery Sense Bluetooth monitor & app
It details your state of charge
Very cool
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      11-29-2017, 08:19 PM   #110
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A couple more views
Stasis charge on M3
This is a 4.3 / AGM mode
The 330i is on the BMW 4.3 OEM ctek that also has Li-ion mode for the new M3. It's on reg. mode
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