AmmoJammo

no answer as to what "max amps" is?

I already know the battery has been left for potentially years... And this is why I didn't want to try and "bring it back" The box was unopened, and the supplier even said "the D3100 batteries have been in our warehouse for a couple of years."

a local car parts store measured this battery as being 1215 ca. but I don't overly trust their test device, so I'll see if I can find someone to load test it to ~500amps.

with the 1000watt inverter running a single 500watt halogen globe, putting about a 50amp load on the battery, it lasted a full 30 minutes till the battery dropped to 11volts (and the inverter complained about low voltage) So I shut it off. this doesn't really seem very good to me? so, now after being "flattened" for 30 minutes, the battery voltage (after being left for 10 minutes) has come back up to 12.3 without a load, so I'll chuck it back on the charger.

ok, I found this on the XS website: CA and CCA have been used since 1914 as a definition for battery performance. CA is defined as a measurement of the number of amps a 12 Volt battery can deliver for 30 seconds at 32°F and not drop below 7.2 volts. CCA is the same test at 0°F. These tests were meaningful for the cars of yesteryear that had to be cranked for a long time to get started. Back then CA and CCA numbers were very meaningful; however, for mobile audio use, immediate burst output is more important. XS Power batteries, when compared to the batteries of yesteryear, deliver much more power more quickly. This instant burst energy is what we call “MAX amps”. But it doesn't explain what exactly "Max amps" is?

yea. thank you captain obvious for not answering any of my questions. keep charging it at 14.9 and you're risking wrecking it anyway, so why even ask?

its meant to be 14.4votls.

How are these figures measured? A 1970's information brochure I was reading about batteries suggests that the CA rating is the current the battery can supply for 30 seconds, without the battery dropping below 1.4volts per cell (8.4volts for a 12volt battery) Is this the same standard being used today? Also, what is the "max amps" then? or is it pretty much like "PMPO" and doesn't mean a whole lot? Or is there some method of testing this also? 3 seconds? short circuit current? thanks!

I have many things I can flatten it with... 1000watt sinewave inverter with 1000watts worth of halogen flood lights connected to it? Might be better with only 500watts on it...

battery is currently sitting at 12.9volts. When cycling the battery, how low should I bring the voltage? and what kinda of load should I put on the battery?

Charged the battery. I'll see what voltage its at tomorrow morning, but I imagine it'll still be 12.5+volts.. even if it is stuffed.

a video I just watched suggested I should be charging the battery at a higher rate, as it can help break up the sulfation... and another website says I should charge it at 1% of the batteries amp hour rating for 48 - 120 hours... :/

when/if it gets to ~12.5volts, I'll put it on the higher current charger. Next question is, once its fully charged to ~14.4volts, if I leave it to rest for about 24 hours, what voltage should it still be floating at?

but 11.5volts isn't the same as 11.3... and 2-3 weeks is a whole lot less than the 6+months this would have been sitting. I'll charge it, see what happens... is 6 amps an ok charge rate for a completely flat battery? Do you know for a fact it sat for 6+months And that battery isint completely flat. 6 amps will charge it, my charger has a 10 amp charger that I use. If its not a float charger then make sure to monitor the voltage when charging it and don't let it go over 14.9 seller just told me the batteries had been sitting in their warehouse for a few years, so its been below 12.6volts for at least 6months I'd say. its not supposed to go over 14.4. The charger I have is a smart charger, 6 or 12 amp selectable, charges to 14.4volts, then switches to 13.8volt trickle charge. However, I'll start it off on a B6 charger set at 1amp...

but 11.5volts isn't the same as 11.3... and 2-3 weeks is a whole lot less than the 6+months this would have been sitting. I'll charge it, see what happens... is 6 amps an ok charge rate for a completely flat battery?

Because of what Nathan has said.... If it had been flattened to this point once, while playing a stereo, no worries! it wouldn't be left sitting flat. But this battery has been getting flatter and flatter for how long? a year? two? how long since it dropped below 12.6volts? The wet battery thats currently in my car was discharged to 11.7volts, and left sitting. Now its stuffed. I know its not an XS battery. I just don't want to have spent $380 on a battery, only to have it fail in 6 months time because of the state it was in when I first received it, as no fault of my own. I've got an Exide Orbital, D34 battery, thats about 6 years old, been used off and on in various installs, in about 6 different cars, and I'd say is in as good condition as the day I bought it.

it will charge, I have no doubt of that. but in 6 months time, when it fails from being over discharged, then what?

I did, I just wanted peoples opinions as to whether this is an acceptable battery voltage, and if it can be revived or not... I pointed out the issues with the battery, and the seller simply said: "Please return for refund if you are unhappy with product" its not a matter of whether or not I'm happy with it... its stuffed.

haven't touched it yet because its so stupidly low, I don't want to mess around with it when the distributor should just replace it, and measure the voltage of the next one before he sends it! I've emailed him, will see what he says. if it can be "brought back" I'd consider it, but I'm rather reluctant at this stage. if it was a battery that I'd over discharged, then for sure I'd do it! but brand new out of the box? How long does a brand new XS D3100 have to be left sitting for to drop that low?

but even Nathan says: I didn't buy a brand new battery expecting to have to "bring it back" just so it works ok. I doubt it'll ever be the way it should be,

So, I live in Australia, was unaware there was even an Australian distributor for XS Power, till exchanging emails with Nathan. I fairly happily placed my order yesterday for a D3100, it arrived today. I was a bit worried when the invoice stated "CA: 1000A, Pulse Amps: 2000A" suggesting an old, lower spec, PowerMaster labelled battery. To my delight, as I opened the box, I was greeted with “1360ca” and “5000amp max” printed on the label. However, my delight soon vanished as the battery is currently sitting at about 11.3volts, which means its most likely stuffed. Not having a go at XS Power at all, its most likely old stock thats been sitting at the distributor in Australia for 2 years.... Is it possible this battery can be restored to its former, and full, glory? Or it is basically just scrap lead? Thanks.

How much power will a D3100 actually burp? assuming an amplifier efficiency of about 80%. based on the load test video, with a 500amp load, after ~4seconds (the length of a burp) the voltage was down to about 11volts? suggesting 5500watts from the battery, so about 4400watts from the amp. but what do the batteries do with more load? how much current can they actually supply for ~4seconds without dropping below 10volts? the video suggests the battery was happy to supply 500amps for 15seconds without even dropping below 11volts...