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#16
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My batteries usually die due to a bad cell. It is not clear to me what causes a bad cell, but typically the hygrometer shows low charge on only one cell. I have never been able to resuscitate a battery with a bad cell. I only use flooded cell batteries because I'm cheap, but how would one tell if a AGM battery had a bad cell?
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'97 E 300 D |
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Battery - 11 - Shop Equipment
everything you ever wanted to know about the early days of flooded lead acid batteries also shows early charging methods, repair methods, and a few other tricks of the trade the funny thing is that a lot of these methods are still in use today in some older electric lift truck repair shops, but not on auto batteries As always - do NOT try this at home! Last edited by Charlie Foxtrot; 12-28-2016 at 01:43 PM. |
#18
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15 years is good! On a W123 id attribute it to ultra low parasitic draw - only a quartz clock on many to draw from a big group 49 battery. Means it stays at a higher soc for longer.
In a w210 Id attribute it to living under the rear seat - heat is the biggest killer of batteries because it accelerates self discharge and side reactions. A desulfation system that is permanently attached to the battery is a parasitic load. I do prefer temperature compensated maintenance chargers that offer a desulfating pulse.
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Current Diesels: 1981 240D (73K) 1982 300CD (169k) 1985 190D (169k) 1991 350SD (113k) 1991 350SD (206k) 1991 300D (228k) 1993 300SD (291k) 1993 300D 2.5T (338k) 1996 Dodge Ram CTD (442k) 1996 Dodge Ram CTD (265k) Past Diesels: 1983 300D (228K) 1985 300D (233K) |
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JHZR2, I agree, it is a parasitic load as the light stays on when engine is switched off.
However, the blurb mentions it only works during the charging cycle turning red to green, this would fit with the pulse operating with power applied. Popped it on overnight with non-smart charger, tested this morning 13.3v - it appears the odd cell has somehow retained a charge, car powers up lights but unable to try starting due to missing fuel pre-filter (pinched for my S124 as new). Hooked up smart charger which is now registering, will leave until new pre-filter arrives.
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David 1996 Mercedes S124 E300TD - 129k - rolling restoration project - 1998 Mercedes W210 300TD - 118k (assimilated into above vehicle) |
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Mike on cumminsforum also has his site mopar1973man.com runs his house on batteries and says the secret is to balance the charge once per month. Says that he routinely gets 10yrs out of the house and truck batteries.
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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do. |
#21
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Ctek battery charger
Kent Bergsma of YouTube fame was touting the Ctek battery charger a few years ago. It has a refurb mode that sends electrical pulses to knock off the sulfate or whatever it is, off the plates.
I don't know if it's helped my battery extend its life since it's only 2 years old. Ctek recommends that you do a refurb once or twice a year, I think. The Ctek was the best out there when I bought, but maybe there's newer/better technology out there, I don't know. 1991 300d, 210k |
#22
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Quote:
Check the specific gravity of the battery before you do anything else. Charging a battery with unacceptable SG is a waste of time.
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Strelnik Invest in America: Buy a Congressman! 1950 170SD 1951 Citroen 11BN 1953 Citroen 11BNF limo 1953 220a project 1959 180D 1960 190D 1960 Borgward Isabella TS 2dr 1983 240D daily driver 1983 380SL 1990 350SDL daily driver alt 3 x Citroen DS21M, down from 5 3 x Citroen 2CV, down from 6 |
#23
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Quote:
CTEK copy battery charger deal - S2Forum - The Audi S2 Community
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David 1996 Mercedes S124 E300TD - 129k - rolling restoration project - 1998 Mercedes W210 300TD - 118k (assimilated into above vehicle) |
#24
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Quote:
Jeff, Agree with you in general, here's a case in point. Bought a motor home recently with a 5.7/ 350 CID engine and single Duralast battery. Took battery home to charge while working on all the other problems associated with a car left in storage for two years with bad starter circuit. Re: the battery- I charged it the conventional way and it works-- for a while. It goes down to about 10.0 volts in a week of non use. I charged it to 100% capacity on my Schumacher charger, then used my Schumacher desulfators for three days on it. Supposedly it ran it up to 100%. When I put the stress tester/carbon pile on it, the meter read weak after 10 seconds. I don't know if it's worth it to keep using the desulfators on it or not. Used it for 3 days continuously. I bet it would start a car but the issue is holding a 12 V charge and for how long? I have battery acid. Probably a specific gravity test and maybe some additional acid might help? Will let you know after the weekend. During this week will charge it and add acid and do specific gravity test on weekend. Maybe it needs a longer duration of desulfying.
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Strelnik Invest in America: Buy a Congressman! 1950 170SD 1951 Citroen 11BN 1953 Citroen 11BNF limo 1953 220a project 1959 180D 1960 190D 1960 Borgward Isabella TS 2dr 1983 240D daily driver 1983 380SL 1990 350SDL daily driver alt 3 x Citroen DS21M, down from 5 3 x Citroen 2CV, down from 6 |
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My thinking is that I don't spend enough on batteries to consider them a problem that needs attention. If there is no parasitic drain and the charging system is good, then the car cranks. When battery fails, drive to store, buy largest CCA with the longest full replacement warranty, watch store monkey install, pay $100 or whatever and done. On to next item.
I'l take a deal if it can be found but time spent searching to save $10 isn't worth the hassle. I'm naturally cheap and that is a difficult lesson to learn AND implement.
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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do. |
#26
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Quote:
Understand the pragmatic approach. Mine is similar except I am big on capability. Comes in handy when relatives and friends need something.
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Strelnik Invest in America: Buy a Congressman! 1950 170SD 1951 Citroen 11BN 1953 Citroen 11BNF limo 1953 220a project 1959 180D 1960 190D 1960 Borgward Isabella TS 2dr 1983 240D daily driver 1983 380SL 1990 350SDL daily driver alt 3 x Citroen DS21M, down from 5 3 x Citroen 2CV, down from 6 |
#27
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might take a while
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I'd leave it on the desulfating charger for at least a month, you may be pleasantly surprised at the end result. My desulfator has saved about 50% of the batteries i've hooked it to, not a bad success rate in my opinion. Mine took about 3 months to revive a battery that had been sitting in my buddies shop for a while, then sat in mine. Currently alive and well and powering my Cummins Dodge truck now.
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2007 Dodge Ram 3500 Cummins Turbo Diesel 4x4 1994 GMC S-15 pickup 4.3 5MT 1985 300 SD 1978 300 CD 1962 220-S Fintail - awaiting restoration |
#28
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Quote:
I have a fork lift battery to charge and even though this is a 12V desulphator and the battery is 36V I think leaving it on for 168 hours (a week) might help its condition.
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Strelnik Invest in America: Buy a Congressman! 1950 170SD 1951 Citroen 11BN 1953 Citroen 11BNF limo 1953 220a project 1959 180D 1960 190D 1960 Borgward Isabella TS 2dr 1983 240D daily driver 1983 380SL 1990 350SDL daily driver alt 3 x Citroen DS21M, down from 5 3 x Citroen 2CV, down from 6 |
#29
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It might need a 36v unit, kits available here, costs/shipping might be favorable with strong dollar.
Battery Desulfators
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David 1996 Mercedes S124 E300TD - 129k - rolling restoration project - 1998 Mercedes W210 300TD - 118k (assimilated into above vehicle) |
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