Resting Voltage??????

[audiolife 5,000+ posts]

Thats fine but do you see what is happening. All the cells or just some are not converting back to a charged state so you want to break it up by discharging it some. If it can come back it MIGHT take a while because the crystals are blocking it without breaking down back into the battery. Charge and discharge to see if any gains are made and this can be tested with a carbon pile. If you charge it then load test it without seeing a gain I would recycle it. This is where the load tester is handy.

 

[disturbed471985 5,000+ posts]

Thats fine but do you see what is happening. All the cells or just some are not converting back to a charged state so you want to break it up by discharging it some. If it can come back it MIGHT take a while because the crystals are blocking it without breaking down back into the battery. Charge and discharge to see if any gains are made and this can be tested with a carbon pile. If you charge it then load test it without seeing a gain I would recycle it. This is where the load tester is handy.

I appreciate the help.. But can you break that down to stupid mans terms. LOL

Should I take it off the charger then wait awhile and put back on is that what u are saying?

 

[audiolife 5,000+ posts]

Loat test it to 9 volts

discharge the battery down to 10.5 volts.

Recharge battery at 2 amps

the recharge should take at least 20 hours

If it says its done faster than that battery is still sulfated

load test it to 9 volts

If the battery is getting better it should take more amps to drop it to 9 volts.

if it is not getting any better recycle it.

 

[audiolife 5,000+ posts]

500 Amp Carbon Pile Load Tester : Battery Testers | SparePartsnMore.Com

Load tester If you do not have one there is bound to be a garage or auto electrical around you that does. Autozone and other stores like them do not use carbon piles. They use pulse testers that allow them to test without charging. They are not very accurate on a lot of agm batteries particularly if they are low or dead and I also would not allow them to recharge an agm battery unless it was an optima. Stores like that are geared to sell you another battery more so than fixing your problems.

 

[audiolife 5,000+ posts]

Also as the battery recovers (if it does) the battery becomes strnger so you may have to raise the voltage expected from 9 to 10.5 volts

 

[madcad95 10+ year member]

Or lol hook it up in the car pull the fuse pump fuse and try starting it like 10 times then recharge aka the poor mans way of doing it what it does is lowers the batt for free then recharge it and wala //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[madcad95 10+ year member]

I don't think that is necessery though just charge it put it in then for a couple of weeks charge it in the car while its not in use and that will help train it

 

[disturbed471985 5,000+ posts]

I might try the fuse thing.. I dnt have time to train and hope it turns out ok I need to know now so if it is bad I csn get with seller and make things right

 

[madcad95 10+ year member]

Then that's what I would do I have a load tester aka batt drainer and love it it helps me train my batts to rest in the high 13s however before I bought it that's what I use to have to do what it does is allows the batt to work a lil kinda like a stretch before a long run //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[akheathen Premium Member]

i honestly don't think your charger is cutting it. that thing likes more. you haven't even reached charging voltage yet, but close. monitor heat at all times, and back-off if it gets bad. once your automatic charger slows down and thinks it's done, jumper-cable it to your car to finish the charge. i had it backwards before- constant voltage, not constant amperage. it should equalize at like 14v, and give you a good reading the next day. hold off on any load tests before then. you don't want it to keep cycling the lower voltages, or it can be damaged. keep an eye that it does not build too much sweat or heat. i always like to do it on a pair of 2x's outside, when not in the battery rack.

 

[disturbed471985 5,000+ posts]

i honestly don't think your charger is cutting it. that thing likes more. you haven't even reached charging voltage yet, but close. monitor heat at all times, and back-off if it gets bad. once your automatic charger slows down and thinks it's done, jumper-cable it to your car to finish the charge. i had it backwards before- constant voltage, not constant amperage. it should equalize at like 14v, and give you a good reading the next day. hold off on any load tests before then. you don't want it to keep cycling the lower voltages, or it can be damaged. keep an eye that it does not build too much sweat or heat. i always like to do it on a pair of 2x's outside, when not in the battery rack.

On 10mp charge it goes past 14 volts so I turmed it on 2v it hovers at 13.4 now during charge

 

[akheathen Premium Member]

i was wondering what charger you have, too. float setting? that should be @ 13.5-13.8, equalizing just over 14... something your car should be able to handle crudely, if the charger can't

btw, this is how over 2k amps(meter pegged out @ 2k) was pulled out of my frozen yellow top, after a 24 hour rest

 

[disturbed471985 5,000+ posts]

i have the schumacher xc10 I can charge the batt to over 14 with this charger yep I have float setting on the float setting right now Batt charged at 13.5v

 

[VWBobby 10+ year member]

Put the battery on a 2A trickle charge for 24 hours or more. It won't damage the battery and will "gently" bring it back to life. If you cram 20A or more (by using a speed charger or your alternator (~80A++) it can heat up the battery and cause more issues. Its better to gently trickle charge a battery that is drained.

Deep cycle does not mean you can let the battery sit at 11.5V all the time. It means the battery can be drained nearly flat and reacharged with little effort. Standard batteries do not perform well when drained, and some won't even come back to life when charged. The plates and design of a standard battery are a lot smaller than a deep cycle.

A typical resting voltage of a "good" battery is 12.2 - 13V on a FULLY charged battery. Anything outside of those specs is suspect, and must be tested after a full charge. Load testers are cheap and a good tool to have. Most auto parts stores will load test a battery for free, just make sure its fully charged first! //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[VWBobby 10+ year member]

Or lol hook it up in the car pull the fuse pump fuse and try starting it like 10 times then recharge aka the poor mans way of doing it what it does is lowers the batt for free then recharge it and wala //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

That makes a lot of sense! Burn up a $75 - 300 starter to try to save $20 buying a load tester! Oh, and its spelled "Voilà", just FYI. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif