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Battery test thread


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its not its OEMd by enersys verified when i called about the sears die hard platinums PM-1s same exact internels different cases.batcap 4000 is the same as odyssey 2150/stinger spp2150/ diehard pm-1.told that guy in the other thread that but some people only believe what they want to and i gain nothing arguing with some "no it all" over the web /rant\

but they're good batts

Interesting, good to know.

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What was the objective of this?

honestly, with the extremely high amount of knowledge you have with car electronics and this being a car audio forum, that question does seem quite rhetorical.

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I hope a deka AGM is on the list. Currently have 2 group 24's but I'm getting a group 31 this summer. After that going Xs power but my wallet isn't ready for $500 on a battery

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What was the objective of this?

honestly, with the extremely high amount of knowledge you have with car electronics and this being a car audio forum, that question does seem quite rhetorical.

Well, I truly did not understand the objective. Guys, you all know I love stuff like this. I also own a similar Snap-On AVR analyzer, only several models newer. They are the best machines of their kind, but as you can see in the videos it is quite difficult to provide consistent loads from one battery to another. More importantly, this is not how the machine was designed to be used.

I see the following problems:

1. The battery clamps on the analyzer itself appear to have been cut off and SWWS (smash wire with screw) eyelets installed on the ends of the cables. This type of eyelet would not be my first choice as there can be considerable voltage drop in these kinds of connections at 500 Amps. The battery clamps that Snap-On shipped the machines with are 800 Amp clamps, designed for minimal voltage drop - the best clamp available.

2. Not all of the batteries tested are new. Some look to be quite well used. Although a battery may still rest at a respectable voltage, the plates within it can be compromised by deep cycling, sulfation, etc. Only absolutely brand new batteries could be tested and each would need to be fully charged before the testing to provide the best data.

3. One can't make a determination on how a particular battery performs by testing a single sample. To obtain meaningful data, a certain number of the same battery (say like 50) would need be tested, all of that data recorded, and then one could summarize how a particular battery performed by averaging the results, discarding the highest and lowest performers of that model in any one criteria.

4. The load must be consistent across all batteries tested. One can't load one battery at 503 Amps and another at 524 Amps. Each battery has to have the EXACT load for the EXACT amount of time.

5. I don't see the correlation between a battery loaded with a static load, like the 500 Amp carbon pile load in the Snap-On AVR analyzer, and the load of an audio amplifier, which would be vastly different as amplifiers gulp current based on the frequency of operation of the power supply. Depending on the design of the amplifier, that could be 30,000 to 50,000 times per second. Although one may think that a 500 Amp static load is the same as a 500 Amp load of a power amplifier, it really isn't. A better load would be that of an audio amplifier connected to a resistive load bank with a test tone of a given level input into it's preamp section. Even then, the gain control on the amplifier would need to be adjusted slightly with each test to get an exact 500 Amp load.

6. The very act of pulling current from a battery causes it's voltage to drop. A larger battery will have less voltage drop than a smaller one. To that end, one could not compare Group 34 batteries to Group 31 batteries and load them similarly and draw meaningful results.

Finally, if you read the instructions on the Snap-On Analyzers, they have very specific criteria for testing batteries, mainly to determine if a battery is GOOD or needs to be replaced. That is really the purpose of the AVR analyzer. They were not intended to be used in this fashion.

Guys - if we allow science to guide us, we will find fact. If we guess at it, we will create rumor.

Tony Candela - SMD Sales & Marketing
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I remembered seeing a similar video on XS Power's You Tube Channel. What I like about this video is that several of the points I make above are adressed. What I like most is the video description - be sure and read it.

Tony Candela - SMD Sales & Marketing
Email me at [email protected] to learn about becoming an SMD Partner!

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imo the results all seem very similar

Setup:


2010 Hyundai Elantra


Factory Unit via 4 chan NVX LOC


Excessive Amperage "H/O" Alt


Xs D3400/ Xs XP3000


Big 3. 2 Runs of +, 2 Runs of -


DD M3b and 2 12" AQ HDC4s

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