>take car in for service
>they tell me NY battery failed their test
>new battery is $158
>old one is 2 years old never had a hiccup
Are they trying to fuck me
>>14883710
go to autozone and have them test it.
>>14883710
More tay-tay plesae
>>14883710
You don't have to agree to have it replaced.
You COULD just take the risk and continue driving with that battery... or, you know, have it tested elsewhere.
>>14883710
Is that marie mccray?
>>14883710
What battery? Googling "ny battery" just gets me links about Battery Park in NYC.
>>14883909
Maybe he's dragging around 5% of the island.
>>14883710
>2years old
>what is warranty
Costco sells battery's for 77$ with a core
>>14883710
I can see your cunt, and I want it.
You can't purchase a fucking multimeter and check it yourself you useless cunt?
>>14884152
>tfw you want to use a multimeter on tay's useful cunt.
>>14883990
It's Taylor Swift you dumb truck
>>14884163
Taylor Swift is OP?
>>14884152
>implying multimeters can measure amps
>>14884222
>I'm literally mentally retarded
>>14883710
scam.
When your battery starts to struggle to start the car/bike/whatever then its time to look for a new one. Usually early morning when its cold will give you an indication of how well it works.
They want your money.
>>14884222
Except that they can.
>>14884222
they can you retard.
up to 1000A on some good ones!
and even more if you use clamp-type multimeter.
>>14884246
>tfw you battery barely starts your car.
>tfw this has been going on for two years
>tfw you know one day it wont start and you will be teh stranded
>tfw you don't know if that day is today.
>>14884253
>>14884251
>people who have never load tested an alternator
OP battery tests check what percentage of battery life is left. Older ones were a simple load tester, newer ones use black wizardry. It's reliable in as much as most people don't want to risk a flat battery.
If you put in the wrong parameters, you get a bad reading, but other than that they're fairly honest.
What is tricky is your car might not need more than 20% of the battery life to be acceptable. My in laws have a modern small diesel and an old petrol car. When the diesel battery was struggling to start, I threw it in the petrol car and got another two years out of it.
Anyway short story is it's up to you. Your battery might be on the edge, and it just needs a decently cold morning or you leaving the radio on too long to take it out. Two years isn't long though, most batteries get 3+ on the regular. This is assuming you actually checked the installation date and aren't relying on your memory...
>>14884283
If it is a maintainable battery just top it up.
If not just run it till it dead.
>>14884310
Fuck that, I like the thrill of never knowing if my car will start, if I will have to talk to people I don't know to try and get a jump, or if I will have to try and push start it by myself.
>>14883710
Just easy way to scare you. Done it a couple of times lots of people get scared when they hear the words battery failed
>>14884246
You don't understand the concept of preventative maintenance. Most people simply don't want to get caught out, ever. If your battery is starting to fail, it's too late already.
Don't forget that with EFI cars, the engine can be happily cranking but the ECU will switch off under about 10.5V (or thereabouts). So the battery can sound fine, hitting 10.6 under cranking load, and then one day simply not start.
And then usually what happens is the customer goes around telling people their shithouse mechanic doesn't look after their car properly
>>14884328
>people get scared when they hear the words battery failed
It's like the words vaginal rupture... nobody wants to hear that.
>>14884310
>If it is a maintainable battery just top it up.
adding water doesn't add life bruz
it just prevents premature death. If the battery's on the way out, topping it up and stirring up the shit at the bottom of the cells is a great way to knock it off
>>14884222
>>14884152
While this anon is restarted, you cannot use a multimeter to do a draw test on a battery. The machines techs use can tell if a battery is on its way out, that is if they used the machine right. Dirty terminals or incorrect terminal adaptors can give false reading
>>14883710
Easy way to test go to harbor freight buy 5 dollar volt meter put negative side on negative post positive side on positive post. If it says 11 to 12 volts your good, start the car repeat if it fluctuates between 12 to 14 your alternator is good. And you can tell them he's full of shit.
>>14884347
Honestly this is all horse shit.
I pop a vent cap off, stick my finger in there and taste what the electrolyte is like. This is the only way you can really tell.
>>14884347
>you cannot use a multimeter to do a draw test on a battery
Actually you can, I used to teach first year apprentices how to do this.
Measure resting voltage - should be 12.6
Make sure all your terminals and stuff are clean.
Prevent the engine from starting - remove EFI fuse, or fuel pump fuse, anything like that.
Have someone crank the motor for six seconds and measure the batter voltage during this time. I can't remember the exact number, I think it's 10.5v, which is the minimum required voltage under cranking. After that relays and ECUs start switching off.
Check the resting charge again - should go back up to 12.6 within a minute. If it doesn't, repeat the test.
You can also acceptably load test the alternator with a voltmeter. Everything required to load test a battery and charging system is already bolted to the car, you just have to think about it a bit.
>>14884361
tastes kinda tingly
one of our old trade school teachers actually had us do this. Hopefully my tongue cancer shows up before he dies so I can sue him
>>14884361
>>14883990
Tay Sway's vagoo has seen more dicks than a high school gym teacher, you would be wise to stay away from it.
>>14884421
It's only those afraid of cancer who get it.
If you show the cancer no fear, it can not grow inside your man body.
Go buy a battery charger (6amp) and let it boost your core up overnight
>>14884343
Well explain this true scenario.
>go to start pickup
>clicking
>pickup in bad position with battery near cliff face
>sister pickup can only get so close and jumper cables too short.
>open up cells
>lol where is the water
>chop some coconuts and throw coconut water in cells
>starts with normal strength
>battery manufactures hate this trick
>>14883988
Depends on the size.
>>14884152
Load testers aren't the same thing as mulitmeters.
>>14883710
Is your car a newer BMW? Anything with a N or S63 needs a new battery every 15,000 miles due to the fucky way that BMW lets the car run the battery WAY down before putting load on the alternator, in order to save a little gas.
>>14884360
A 12 volt car battery that is fully charged should read 13.5 volts. It's considered dead at 10.5 volts.
You tell if a charged or dead battery is still good by throwing a 100 amp load on it and measuring the voltage under load. It should fall to a given voltage (depends on cranking amp rating, but for 600 it's 10 volts) and hold that voltage for a minute. If the voltage starts to flag as you hold load, it's a weak battery that you should consider replacing.
If the voltage drops hard and fast, it probably won't even start the car.
>>14883773
Sure here you go friend
>>14883773
>>14886652
>>14883710
>>14886661
>taylor swift
>>14883710
I can't think of the last time I found a car battery with less than a three year warranty.Even autofactors' "own brand" have that. Yuassa and Bosch are normaly 5 years.
>>14884361
For anyone who might not know, there is a tool for checking electrolyte called a hydrometer. Part stores sell them, no need to taste diluted acid.
>>14885792
12.6 is fully charged and anything below 11.9 is discharged. Dead is 0 volts.
>AAA roadside assist driver here AMA
>>14888323
Wallyworld has 1 year free replacements for $54 here in Phoenix
>>14883990
it's photoshopped you moron
![ragnar-smiling[1].jpg](https://i.imgur.com/pUJT7pF.jpg "ragnar-smiling[1].jpg")
Tell them THEY failed YOUR test
Do a donut in their parking lot as you leave
>take car in for oil change
>every single time they say my battery's about to die any minute
>3 years later
Mr Lube BTFO
>>14884395
it's 13.7 famalam
>>14885792
>>14889016
Retards. That's the alternator charging voltage. Car battery is 6 cells at 2.1 volts each. 12.6 volts fully charged. Anything higher is just a surface charge.
>>14888568
Of course it's photo shopped, if she stood still long enough some kid would want to use her for a bike rack.
riddle me this.
my bike battery was completely dead.
it was reading 12.6v
when I turned the key the voltage dropped to like .5v and nothing happened.
charged it for an hour, after the volts stabilized went back to 12.6, but same as before.
when I turned the key with the 2amp charger connected, it kinda started to turn on, but not really.
It ran fine the previous day.
bought a new battery, old one was bad. works fine now.
but what the hell would cause it fail like that and still output 12.6v?
>>14890815
That's what a battery acts like when it has a cell failure.
One cell had probably been close to empty for a while.
>>14890722
Alternator voltage should be 13.7 to 14.7
Fresh, fully charged batteries should be 13 to 13.5
>>14891114
Try 13 to 15 volts.
12.6v=fully charged
>>14891098
shouldnt the voltage be lower tho?
>>14890798
I want to use her for a dick rack.
