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#41
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Does everybody have a 7002? Nope. Does everybody have a high beam headlight and a clock? Yep. -awr
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
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#42
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Your responses and paraphrasing are not what I said. I accept I am not making myself clear even though I've tried several times. Doesn't matter.
FYI it is not necessary to load test with the 7002. The CTEK does a full analysis of the battery. If there is a problem with the battery the unit will stop the charging cycle and a red error led comes on. If that happens I try the reconditioning mode especially if the battery has been completely discharged. If the error light comes on again the battery is bad.
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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior Dallas Last edited by bcredliner; 03-19-2019 at 08:35 PM. |
#43
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I've gotten Walmart EverStart H8 AGM units for $149.
A great deal plus tax and $15 core fee https://www.walmart.com/ip/EverStart...up-h8/40647529 Mike
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Mike Dallas, TX & Appleton, WI 2003 E53 4.4i Pearl Beige 2003 E46 330Xi Monaco Blue 2007 E90 335Xi Black Sapphire Metallic 2011 F25 X3 28i Black Sapphire Metallic |
#44
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Bcred, thanks for your comments. If Andrewwyn had a case based on facts then it is worthwhile recording here. You may disagree (and it is worthwhile writing that) but there is the fact that equipment built for testing is only as good as the overall knowledge gone into designing it. It is not uncommon for updates to be made to equipment when new problems are discovered (igoring the operators fault). Even though equipment may have gone into years/decades of testing. I am far from the knowlege behind these but it is good to read anything out of the ordinary in these forums to assist. Andrewwyn, without seeing the total setup, method, etc. of the occurance there all we can do is take your word that it wasn’t something else but again it is more than worthwhile posting it to this forum in case someone else has the same problem. Thanks to you both and hope that I have not stood on your toes. It would be quite easy as I am 6’8” with big feet...)
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#45
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I think (and still not sure) that it came off that I said you would "have to" do some testing on your own to determine the end of life state is a battery. I was simply saying that the normal process that 95% of people will do (charge up your battery take to a battery store and get a load test done) can report a false negative (that battery is good but isn't). for *whatever* reason.
I was saying it happened to me about a year ago. I've worked a LOT with batteries including designed and built battery chargers, I was stumped so I shared my story because if it happened to me It will happen to others. I simply said : "if the same happens to you, here is a possible route to take".
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#46
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Quote:
If the only reason one needs a charger/tester is to see if a battery is bad every 4 years or so I can see why there is no need to have one. I wouldn't think of them as DIYers if that is the only use they have for one.
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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior Dallas |
#47
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Quote:
What intermittent problems are you referencing?
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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior Dallas |
#48
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Quote:
And I actually once had a tough intermittent battery problem on my old 911. Very simple electrical system on that car, and I would have about 1/10 failure to start, randomly. Hooking up jumper cables would make it start instantly (no need to charge). Battery, alternator, everything I could measure tested fine. Removed and cleaned all ground straps, etc. In the end it was basically process of elimination and I swapped in a new battery. It was not until about 6 months of no failures that I was sure I had fixed the problem. So in that case, it was an intermittent internal battery problem. Due to its rare occurence, one would need to be lucky to ever detect it. But it was a real problem when it happened, as you can imagine. That experience led me toward the setup where I try to have interchangeable batteries so at the first puzzling observation, I can just swap batteries and see what changes. My X5 can swap with my Cayenne, and my 3 Japanese cars can swap. The 911 is not directly interchangeable, but I could get it done if needed.
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2001 X5 3.0i, 203k miles, AT, owned since 2014 |
#49
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Battery for E53 2005 4.4i
Code:
Battery capacity test. Battery Capacity Test: Perform a battery load test to see if service or replacement is necessary. First determine the load by retrieving the CCA from the battery case and reducing this number by half. The discharge rate is one half of the batteries cold cranking rating. Apply this load to the battery for 15 seconds. The battery's voltage must remain above 9.6 volts at 70° F. (Also it's not a capacity test it's only an estimate just like the CCA "test" done at 25C is just an estimate based on test curves and math). Example: drive your car only highway for an hour or so, your DTE will be very optimistic compared to reality when you switch to all city driving. the DTE estimate isn't "wrong" it's just not clairvoyant. My battery put out 500A for 15 to 30 seconds and held over 9.6v. That same battery had previously not been able to start my car (200-220A) after 25 minutes of running an iPhone. (Hence why I went to get a load test (and they also did the quick capacity test as described above) So, I figured I must have left something on or FSU was killing my battery until a week or so later when after leaving my hazzards on for no more than 8 minutes, again I could not start my car and I needed to use my booster pack. (This same battery never had a problem first start every time at zero F, even a couple starts in a row without running to charge). I literally had a 700A strong but 0.2AH capacity battery. I am FOR CERTAIN not the only person this has happened to and will not be the last, so: again just pointing out to people that may find themselves in the identical predicament, test don't guess, even if "they swear" the battery is good, it can be end of life failed even when it passes the tests. I only wish I still had the battery so I could test it more throughly. If I had similar symptoms in the future, I would go get a load test (and quick capacity test) and if the battery passed I personally would do a longer test of the actual capacity as the mfgr does eg pull 1/20 of the AH rating and see how long it takes to reach the mfg cut off voltage (probably 9.6 or 10v). It's a real world and simple thing anybody can do, they just need some device that pulls a few A and some time and a voltage measuring tool. For those that have a tool like the 7002 that's awesome for them, doesn't help the other 99%
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2011 E70 • N55 (me) 2012 E70 • N63 (wife) |
#50
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Quote:
Why are you suggesting to go have a load test done if you already believe the industry standard for testing is inconclusive. Just do your test and if it tests good there is no reason to go to the store, if it tests bad still no reason to have the store test it and then have to try to explain to them why their test if flawed. Your link took me to a site to buy a printer cartridge
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X5 4.6 2002 Black Sap, Black interior. 2013 X5M Melbourne Red, Bamboo interior Dallas |
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