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CTEK MX5 Battery Charger What Do You Think? #4991516 01/26/19 03:21 PM
Joined: Sep 2007
Posts: 624
Driz Offline OP
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I got one a couple months ago looking mainly for the battery desulphation revival use. Something to supplement my 1981 Craftsman rig that’s not a smart charger.
I tried it on a few sort of sick batteries. I have a load tester so know each is just in the green but getting weak. I’ve tried it on 4 so far and tested each before and after letting each sit and do its thing for a few days. Ok it charged them all overnight sure, Beyond that I have to say I’m not impressed . 🤨 They might be somewhat better but every one sure came nowhere near even the middle of that green OK dial . Not one,I’m far from impressed by this thing. What’s anyone elses experiences with with these CTEK rigs. Is there some sort of magic to be had by leaving it on for weeks that I am missing ? The directions are awfully vague🤥

Re: CTEK MX5 Battery Charger What Do You Think? [Re: Driz] #4991537 01/26/19 03:56 PM
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bobdoo Offline
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I have a MUS4.3 and Multi US 25000 8. The small one for cycle/car and the big one for trolling and sump pump batts.

Also a now-unused battery tender, and a variety of 'dumb' chargers.

The Cteks are worth the money. They both have 'reconditioning' choices, which push higher voltage thru the cells to equalize them. This is a big deal, and works shown by my hydrometer before/after testing.

Re: CTEK MX5 Battery Charger What Do You Think? [Re: Driz] #4991554 01/26/19 04:12 PM
Joined: May 2013
Posts: 704
SilverSnake Offline
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I have been using CTEK chargers for years. Currently have the Multi US 7002 and the CTEK MUS 4.3. I use them to maintain healthy batteries not to try to resurrect those that are "sick." Very happy with the results.


2016 Charger, 6.4L-485 HP (PUP 0W-40)
2017 BMW 330i, 2L-248 HP (BMW 0W-20)
2018 Jeep GC, 5.7L-360 HP (PUP 5W-20)
2008 20KW Generac (Amsoil 10W-30/30)
Re: CTEK MX5 Battery Charger What Do You Think? [Re: Driz] #4991562 01/26/19 04:26 PM
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RF Overlord Offline
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I have a CTEK Multi US 3300 and it worked a treat on 2 batteries that were left in cars over a winter.


Supercharged '03 Mercury Marauder - Trilogy Motorsports #61
PP 5W-30 / MC FL820S

'04 Grand Marquis LS Limited Edition - MC 5W-20 / FL820S

'00 Grand Marquis GS - being resurrected. Slowly.
Re: CTEK MX5 Battery Charger What Do You Think? [Re: Driz] #4991602 01/26/19 05:03 PM
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Posts: 2,096
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krismoriah72 Offline
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I have the Schumacher SC1319 I have used it and abused it for a couple of years on my UTV, riding mower and also several car batteries. Can be had at tractor supply or amazon for $25.

I always put a multimeter on after the green light kicks and batteries are always fully charged..

Re: CTEK MX5 Battery Charger What Do You Think? [Re: Driz] #4991664 01/26/19 06:08 PM
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Posts: 889
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anndel Offline
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I have the Multi US 7200 as well and used it to recharge completely drained (<10.0 V) flooded cell batteries (NORMAL mode) and it worked very well.


1993 Toyota 4x4 p/u, 2.4L 22RE 4 cyl - M1 EP 10W-30, Fram UG Filter
2005 Toyota Avalon XL, 3.5L V6, Amsoil XL 5W-30, Amsoil Filter
2014 Toyota Tacoma 4.0L V6, Amsoil SS 5W-30, Yota OEM Filter
Re: CTEK MX5 Battery Charger What Do You Think? [Re: Driz] #4991672 01/26/19 06:11 PM
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UncleDave Offline
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I like my ctek 7002 a lot and ctek in general.

I LOVE my optimate 6's.

UD


Uncle Dave
Cat 3126/2 MB3500/Titan/RX400H/17 Ridgeline
700HP V10/ 725HP BBC/ Raptor 700/ KFX450/ YZ250/Onan 8K/ Cat3011C
Re: CTEK MX5 Battery Charger What Do You Think? [Re: Driz] #4991693 01/26/19 06:23 PM
Joined: Mar 2012
Posts: 8,176
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edyvw Online Content
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Joined: Mar 2012
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Originally Posted by Driz
I got one a couple months ago looking mainly for the battery desulphation revival use. Something to supplement my 1981 Craftsman rig that’s not a smart charger.
I tried it on a few sort of sick batteries. I have a load tester so know each is just in the green but getting weak. I’ve tried it on 4 so far and tested each before and after letting each sit and do its thing for a few days. Ok it charged them all overnight sure, Beyond that I have to say I’m not impressed . 🤨 They might be somewhat better but every one sure came nowhere near even the middle of that green OK dial . Not one,I’m far from impressed by this thing. What’s anyone elses experiences with with these CTEK rigs. Is there some sort of magic to be had by leaving it on for weeks that I am missing ? The directions are awfully vague🤥

CTEK are made for AGM batteries mostly and gained popularity with BMW owners when BMW went all on AGM.
They are very slow chargers and that is what AGM batteries like.


15' Toyota Sienna AWD (Mobil1 5W30 EP+OEM filter).
11' VW Tiguan 2.0T (Castrol 0W40+MANN filter)
Re: CTEK MX5 Battery Charger What Do You Think? [Re: edyvw] #4991700 01/26/19 06:30 PM
Joined: Oct 2002
Posts: 38,152
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Quattro Pete Offline
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Originally Posted by edyvw
They are very slow chargers
Not all of them. The 7002 can charge at 7A - not super fast, but not exactly slow either.

Quote
and that is what AGM batteries like.
Not true at all. As a matter of fact, an AGM can be charged with a higher rate than a traditional lead acid battery.

If you're just topping off, it doesn't really matter.


2002 530i   2015 Q5 3.0T   2018 Charger SRT
Re: CTEK MX5 Battery Charger What Do You Think? [Re: Driz] #4991745 01/26/19 07:12 PM
Joined: Jan 2009
Posts: 7,387
gathermewool Offline
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What makes you trust your load tester for accurate readings?


14 Forester XT Touring FA20DIT (Cobb Stage 1)
Castrol Magnatec 5W-30 D1G2 + FU filter (72,320mi, 8/24/19)
15 Legacy Premium FB25
Magnatec 5W-20 + FU filter (47,300mi, 5/11/19)
Re: CTEK MX5 Battery Charger What Do You Think? [Re: Quattro Pete] #4991767 01/26/19 07:54 PM
Joined: Jul 2008
Posts: 1,423
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ecotourist Online Content
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Originally Posted by Quattro Pete
As a matter of fact, an AGM can be charged with a higher rate than a traditional lead acid battery.

If you're just topping off, it doesn't really matter.

I have a CTEK Multi US 3300 and recently bought a huge AGM for my BMW. The charger has an AGM setting but the manual is a bit vague about whether you should use that setting or not. And it's not very practical to check with the distributor (Canadian Tire) as the manual suggests. Who would you ask?

So would you charge it on the AGM setting? I was having unexplained and random discharging problems and used the charger a couple of times on the normal Auto battery setting. It seemed to work fine. The random discharging was because the AC fan was running from time to time when the key was off.

I like the CTEK just fine.


2000 BMW 528i 5MT M Sport
2007 Honda Accord EX-L 4Door V6 6MT
Re: CTEK MX5 Battery Charger What Do You Think? [Re: ecotourist] #4991783 01/26/19 08:07 PM
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Quattro Pete Offline
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Originally Posted by ecotourist
I have a CTEK Multi US 3300 and recently bought a huge AGM for my BMW. The charger has an AGM setting but the manual is a bit vague about whether you should use that setting or not. And it's not very practical to check with the distributor (Canadian Tire) as the manual suggests. Who would you ask?

So would you charge it on the AGM setting?

Since not all AGM batteries are the same, I would probably ask the battery manufacturer. This is from an FAQ on CTEK's website:
Quote
Q. I have an AGM battery. Do I charge it in snowflake mode?
A. It depends. Optima and Hawker recommend snowflake mode. If there is no indication on the battery, use car mode for batteries over 14Ah or MC mode for batteries under 14Ah.

And if the ambient temp during battery charging is below 41F, I would charge it in "snowflake mode", regardless if it was lead acid or AGM, as per the owner's manual.

Is this battery for your 528i? Which specific battery did you get? I'm going to probably need a new battery for my 530i soon, and still debating whether to get AGM (probably Bosch) or another lead-acid one. My car seems to constantly undercharge the battery, and I don't know if getting AGM is going to make things worse or better.


2002 530i   2015 Q5 3.0T   2018 Charger SRT
Re: CTEK MX5 Battery Charger What Do You Think? [Re: Driz] #4991792 01/26/19 08:14 PM
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Donald Offline
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I have only used Battery Minder chargers and maintainers. I think they have sophisticated desulfation circuits. But in emails they said it can take weeks.

I am not saying desulfation is a hoax, but I think the battery has to be a good candidate for desulfation and I am guessing not all batteries are. And I do not know what makes a good candidate and how to tell.


2015 Subaru Forester 2.5 engine/CVT
2015 Ford F250 w/Powerstroke
2016 Subaru Crosstrek CVT (wife's)
Re: CTEK MX5 Battery Charger What Do You Think? [Re: Quattro Pete] #4991812 01/26/19 08:29 PM
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ecotourist Online Content
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Originally Posted by Quattro Pete
Since not all AGM batteries are the same, I would probably ask the battery manufacturer. This is from an FAQ on CTEK's website:
Quote
Q. I have an AGM battery. Do I charge it in snowflake mode?
A. It depends. Optima and Hawker recommend snowflake mode. If there is no indication on the battery, use car mode for batteries over 14Ah or MC mode for batteries under 14Ah.

And if the ambient temp during battery charging is below 41F, I would charge it in "snowflake mode", regardless if it was lead acid or AGM, as per the owner's manual.

Is this battery for your 528i? Which specific battery did you get? I'm going to probably need a new battery for my 530i soon, and still debating whether to get AGM (probably Bosch) or another lead-acid one. My car seems to constantly undercharge the battery, and I don't know if getting AGM is going to make things worse or better.

Yes it's for the 528i. My battery failed during the free replacement warranty period - and the AGM battery (on sale) was a few cents less than the regular price on the battery I had installed (which they didn't have in stock anyway). So I got an AGM by default. It is the recommended battery for my BMW and the regular price is a lot more than the lead acid battery it replaced. It's too soon to say anything much about it. But with the random discharging (hopefully) corrected it should be fine.


2000 BMW 528i 5MT M Sport
2007 Honda Accord EX-L 4Door V6 6MT
Re: CTEK MX5 Battery Charger What Do You Think? [Re: Donald] #4991815 01/26/19 08:30 PM
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Quattro Pete Offline
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Originally Posted by Donald
I have only used Battery Minder chargers and maintainers. I think they have sophisticated desulfation circuits. But in emails they said it can take weeks.
Yeah, I had my BatteryMinder 2012 hooked up to my car battery for weeks once, and the desulfation light never stopped flashing. No idea if it ever actually helped the battery in any way.


2002 530i   2015 Q5 3.0T   2018 Charger SRT
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