Author Topic: AGM battery charger/maintainers  (Read 205 times)

Offline 70chall440

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AGM battery charger/maintainers
« on: November 19, 2017 - 02:43:21 pm »
I apologize for the lengthy post in advance, but I thought I would throw this out there as I have heard/read many talk about this subject.

I have about 9 vehicles most of which are maintainers most of the time. I currently own several Battery Tender's, 3 Battery Saver (R2 Battery Saver), 1 Ctek 3300, 3 or 4 Harbor freight trickle chargers, 2+ Schumacher chargers, etc. I also use a lot of Optima batteries (red and yellow top) as well as several lead acid batteries and a Die Hard Platinum.

I went to SEMA last year and ran into the guy from R2 Battery Saver who regaled me with an explanation of how high speed his devices were/are and how they extend the life of a battery (especially a AGM) far longer than anything else out there. I was impressed as it seemed well thought out and executed, therefore I bought 3 of them even though at the time I already had several battery tenders, the Ctek and the HF tenders.

I had a relatively new yellow top go dead in one of the vehicles due to non use and a lack of a maintainer so I thought this would be a good test for the Battery Saver as it supposedly would bring back a dead AGM battery. Well, in that case it did not despite leaving it connected for over a week. I ended up putting a new Schumacher charger with AGM mode on it only to have it get super hot and actually vent off (as in steam coming out it). Needless to say, that battery was toast; I cant blame any device for not helping that one. 

I recently (last week) left the key on in my 52 rat rod Dodge PU which drained the 10+ year old red top. I thought this would be a good test for the Battery Saver so I connected it. After 2 days it would say it was 100% but only showed 6 volts. I then removed it and attached the Schumacher AGM charger, it got to 7.8 volts and said it was 100%. So naturally I thought, "this battery is done". I watched a You Tube video from Optima about bringing a dead Optima back in which they used a Ctek charger; since I own one I thought lets give that a try. I connected it and within 3 hours I was at 9.8 volts, 5 hours 11.7 and within about 18 hours 13.4 volts showing a full battery.

The morale of this story (for me) is that Ctek is a great product for AGM batteries and I will be buying more. I cannot bad mouth the battery tenders (brand) as they keep my Harleys topped off as well as my Viper. As for the HF tenders, I think they do work to some degree on a good battery but I do not think they will help a run down battery, for sure not in a timely fashion. As for the R2 Battery Savers, they at are probably ok as maintainers but nothing beyond that. Bear in mind that the Ctek and the Battery saver at both entry level models, so it isn't as if the Ctek was higher level in terms of capability. Yes the Ctek is probably $20-$30 more money (for the base models) but as far as I am concerned far better.

Next one I buy will be a higher end model with desulphation mode (recondition) as I have come to believe that is something I need.

I am sure there are many opinions here about this subject probably beginning with the battery first (many do not like Optima's), however I have been using them for the last 20+ years and find they do well for my applications. Hope this is helpful to someone and since Xmas is almost upon us, a Ctek charger might be a good gift (to you  :bigsmile:)

Just a last note; I don't work for Ctek nor am I in anyway affiliated with them, I just own a pile of cars that need batteries maintained and charged from time to time.  :thumbsup:
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)




Offline 73440

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Re: AGM battery charger/maintainers
« Reply #1 on: November 19, 2017 - 10:20:20 pm »
https://smartercharger.com/battery-chargers/

I had never hard of Ctek, they sure don't look like the ones I have always used.
May have to give them a try.
67 440
73 Barracuda w/ 68 440
65 Plymouth Fury III , I sold ,was my Nana's car till 92 yo.
51 Ford F1 239 Flathead, flipped , new cab , stolen
59 BelAir 283 4 door original patina
01 Chevy van 384,967 miles
06 Crown Vic Police Interceptor
75 HD Ironhead converted to RH shift
73 HD Ironhead
82 HD Ironhead
74 Norton 850
80 HD Shovelhead
80 Husqvarna WR 390

Offline 70chall440

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Re: AGM battery charger/maintainers
« Reply #2 on: November 19, 2017 - 11:22:59 pm »
That them; I am thinking of buying the 7002 or the 5.0
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)


Offline Topcat

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Re: AGM battery charger/maintainers
« Reply #3 on: November 20, 2017 - 12:00:04 am »
CTEK was the charger I boasted the most of when I sold batteries.

I recommend dump the Optima's and go with Northstar and X2. (same battery)

http://www.fourwheeler.com/how-to/154-1303-battery-bashing/#photo-06

Optima's use recycled lead with a percentage of Calcium.
Now made in Mexico their QC went downhill ever since they left CO.

We had many return every week dead while still under warranty.
Mike, Fremont, CA.


Offline 70chall440

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Re: AGM battery charger/maintainers
« Reply #4 on: November 20, 2017 - 12:30:06 pm »
I figured someone would jump on here and recommend dumping the Optima's and to be honest I would however I decided due to a fair degree of reflection that they suit my needs mainly because of 2 factors; first is that they are readily available, second is that they are either cheaper or commensurate with other batteries. I talked to Northstar at SEMA and I have no doubt they make awesome products but they cost more and are not locally available. I am currently running 5 optima's and one of them is well over 10 years old. I am not endorsing them, only saying that they work for me. I also believe that many problems with them stem from not understanding them and treating them like a flooded battery especially when they get run down; they can be a pain to recharge (unless you have a Ctek charger  :bigsmile:)
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline Topcat

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Re: AGM battery charger/maintainers
« Reply #5 on: November 21, 2017 - 01:06:21 am »
FWIW...Batteries Plus Bulbs in Olympia, WA.

https://www.batteriesplus.com/store-locator/wa/244
Mike, Fremont, CA.


Offline 70chall440

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Re: AGM battery charger/maintainers
« Reply #6 on: November 24, 2017 - 12:08:04 am »
FWIW...Batteries Plus Bulbs in Olympia, WA.

https://www.batteriesplus.com/store-locator/wa/244

Thanks, I have been at that store. In fact I was just thinking of them to replace the battery in my phone. Looking at their website, they dont seem to carry Ctek chargers but them are plenty of them online.
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline Topcat

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Re: AGM battery charger/maintainers
« Reply #7 on: November 24, 2017 - 11:01:23 pm »
Mike, Fremont, CA.


Offline 70chall440

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Re: AGM battery charger/maintainers
« Reply #8 on: November 25, 2017 - 12:44:19 am »
Probably will  :bigsmile:
Current Mopar
70 Challenger RT 440-6, 73 Cuda (under const)
05 Durango, 99 Dakota, 01 Ram 4x4, 14 2500 4X4, 10 PCP Challenger RT, 01 Viper GTS ACR, 52 B3B w/330 Desoto Hemi, 70 Hemi RR, 61 Jeep FC170
Past Mopars
9 x Challengers. AAR Cuda, 4 RR, 2 GTX, 4 Chargers, etc... (too many to list)

Offline Topcat

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Re: AGM battery charger/maintainers
« Reply #9 on: November 25, 2017 - 12:56:48 am »
I would also call Batteries Plus what deals they have on the X2's this Black Friday week-end FWIW
Mike, Fremont, CA.