AGM battery

coopny

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ya I couldnt even get the light to flash at all, so after 40 min I gave up and grabed the laptop



ya I got it at costco, It want cheep up here in Canada but no agm is. it was around 300 bucks CDN so just over 200 US I guess
The price isn't bad given the warranty. Costco in the US now (since mid-2023) only gives a three year prorated warranty on interstate batteries. So despite the low price (now up to $179.99 USD, or $248.99 CAD at the time of this post) it's a pretty bad deal...
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jkernitzki

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The price isn't bad given the warranty. Costco in the US now (since mid-2023) only gives a three year prorated warranty on interstate batteries. So despite the low price (now up to $179.99 USD, or $248.99 CAD at the time of this post) it's a pretty bad deal...
In AZ that’s still a year longer than I expect a battery to last. In the Phoenix area I plan on a new battery and a new windshield about every two years. :(
 

coopny

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In AZ that’s still a year longer than I expect a battery to last. In the Phoenix area I plan on a new battery and a new windshield about every two years. :(
The problem is Costco's warranty is prorated for the entire warranty duration now.

If you spend $189.00 on a Walmart Everstart Platinum AGM (price just went up, nothing is getting cheaper), that has a four year free replacement. So if that dies one year in, two years in, three years, three years and nine months in - then Walmart gives you a brand new battery, for free.

Most auto parts stores in the US put 3 year free replacement warranties on most AGMs.

Costco is 3 years entirely prorated. So in your example where you expect a battery to only last two years, let's say it makes it to two years, six months. Costco would prorate a refund on the battery. That battery is $179.99 right now. In that case, Costco would only give you $30 back ($179.99/6 = $29.998333... = rounds up to $30).

If it died at the two year mark instead, that'd be 2/3 of the battery value used, so costco would only give you $60 of the purchase price back.

And that's why in the United States, I recommend against Costco batteries. There are way more Walmart's to use the warranty if you require it, the price isn't that much higher, and the warranty is way better...

Again, Costco changed this in July of 2023. Prior to that Costco did "free replacement" (although the "free replacement" was generally a full refund of the battery purchase price, and with economic inflation in recent years, sometimes to buy the same battery it was more expensive.)
 

MedTech

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I’ve seen it posted that some recommend moving to an AGM battery. Is this an attempt to mitigate the auto shut down? If you replace, do have to conduct a battery reset of sorts to let the vehicle know it has a new battery?
If you type your vehicle's information into a website like Autozone or NAPA, you will that AGM is the only option for these vehicles. At least that was my experience when the factory battery died and I had to replace it (this was before the recall). The only place that had one in stock that I could get immediately was Advanced, everybody else I had to order it and wait two days.
 

Stircrazy

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The price isn't bad given the warranty. Costco in the US now (since mid-2023) only gives a three year prorated warranty on interstate batteries. So despite the low price (now up to $179.99 USD, or $248.99 CAD at the time of this post) it's a pretty bad deal...
ya I was just surprised how much batteries have gone up. last year I had to do the wife's car and both of the kids cars at 300 buck each haha.
 


Stircrazy

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In AZ that’s still a year longer than I expect a battery to last. In the Phoenix area I plan on a new battery and a new windshield about every two years. :(
why would you expect it to die that fast, where I live is AZ type temps in the summer and washington type temps in the winter.
 

jkernitzki

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why would you expect it to die that fast, where I live is AZ type temps in the summer and washington type temps in the winter.
You may be comparing to Flagstaff, because BC definitely doesn't have AZ summer temps in the range where the vast majority of our population lives. I've been in Vic and the Lake Cowichan area in the dog days and still needed a jumper in the evening.

In the Valley we're talking 42-47C for months. Overnight lows still over 38C. Under the hood it's closer to 75-80C. Car batteries will get you maybe three years here, and when they die, it's sudden and permanent. Two year replacement is cheap insurance.
 

MedTech

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ya I was just surprised how much batteries have gone up. last year I had to do the wife's car and both of the kids cars at 300 buck each haha.
AGMs are not cheap but should last longer.
 
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Stircrazy

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You may be comparing to Flagstaff, because BC definitely doesn't have AZ summer temps in the range where the vast majority of our population lives. I've been in Vic and the Lake Cowichan area in the dog days and still needed a jumper in the evening.

In the Valley we're talking 42-47C for months. Overnight lows still over 38C. Under the hood it's closer to 75-80C. Car batteries will get you maybe three years here, and when they die, it's sudden and permanent. Two year replacement is cheap insurance.
our normal summer temps are over 35C here and we quite often are in the 40-43C range and some times 45C, our night time tems do cool down as we are higher up in the mountans, so in the summer they cool off to about 20 where I am but you get out camping and they might swing from a 42 temp during the day and 5C at night haha. I would say thoes temps are pretty close, close enough for batteries wearing out anyways. maybe more so with the extream temp swings.

The city I am in is the hottest city in canada for average summer temps. if you were in the victoria and cowichan areas then you have no idea what most of BC's temp are like. you saw the island and lower mainland which is about 17% of BC by land area
 

jkernitzki

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our normal summer temps are over 35C here and we quite often are in the 40-43C range and some times 45C, our night time tems do cool down as we are higher up in the mountans, so in the summer they cool off to about 20 where I am but you get out camping and they might swing from a 42 temp during the day and 5C at night haha. I would say thoes temps are pretty close, close enough for batteries wearing out anyways. maybe more so with the extream temp swings.

The city I am in is the hottest city in canada for average summer temps. if you were in the victoria and cowichan areas then you have no idea what most of BC's temp are like. you saw the island and lower mainland which is about 17% of BC by land area
Other than the famed Lytton heat wave, there's nothing in BC that would give me pause during the summer. And even that was milder than I've experienced here. Past 110F/43.5C, we don't even use numbers, we just call them "plus days". We tend to have a lot of those.

BC Winters are another story altogether. Beautiful, but you can keep them. My blood's entirely too thin for that anymore.

Come spend a summer in the Valley of the Sun--often referred to the Surface of the Sun--and let me know how you compare them. And we're not even the hottest place in the region. It's oppressive, unrelenting, and will kill you in no time. We average about 450 heat-related deaths per year, plus another roughly 450 ER visits. Granted, it's not Dubai where summer is downright painful, but still. I'll trade you any time. ;)

When Frank Herbert wrote, "God created Arrakis to train the faithful", it was after he spent a July weekend in Phoenix.
 


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I don’t know the BC town/city that Stircrazy is referring to but let’s compare Lytton BC to Phoenix AZ*

There really is no comparison… Daytime temps in phoenix are brutal but there’s no relief at night. It’s just heat day and night - it’s that non-stop heat for months on end which obliterates batteries in phoenix

Average Summer Temperatures

Lytton (June-August)
• Average highs: 86–95°F (30–35°C)
• Average lows: 55–63°F (13–17°C)
• Dry heat, but cool nights

Phoenix (June-August)
• Average highs: 104-110°F (40-43°C)
• Average lows: 80-90°F (27-32°C)
• Very hot days and hot nights

Extreme Heat

Lytton
• All-time record: 121.3°F (49.6°C) (highest ever in Canada)
• Can spike into 100-115°F during heat waves
• These extremes are rare and short-lived

Phoenix
• Regularly hits 110-118°F every summer• F
• Records around 118-122°F
• Extreme heat is routine, not unusual

Nighttime Cooling (Huge Difference)
• Lytton: drops into the 50s-60s°F → homes cool off naturally
• Phoenix: often stays 85-95°F overnight → little relief

Nighttime Cooling is one of the biggest practical differences. Phoenix just does not cool down in the summers (except for the occasional storm).

*AI Tool provided above data which may or may not be accurate
 

jkernitzki

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I don’t know the BC town/city that Stircrazy is referring to but let’s compare Lytton BC to Phoenix AZ*

There really is no comparison… Daytime temps in phoenix are brutal but there’s no relief at night. It’s just heat day and night - it’s that non-stop heat for months on end which obliterates batteries in phoenix

Average Summer Temperatures

Lytton (June-August)
• Average highs: 86–95°F (30–35°C)
• Average lows: 55–63°F (13–17°C)
• Dry heat, but cool nights

Phoenix (June-August)
• Average highs: 104-110°F (40-43°C)
• Average lows: 80-90°F (27-32°C)
• Very hot days and hot nights

Extreme Heat

Lytton
• All-time record: 121.3°F (49.6°C) (highest ever in Canada)
• Can spike into 100-115°F during heat waves
• These extremes are rare and short-lived

Phoenix
• Regularly hits 110-118°F every summer• F
• Records around 118-122°F
• Extreme heat is routine, not unusual

Nighttime Cooling (Huge Difference)
• Lytton: drops into the 50s-60s°F → homes cool off naturally
• Phoenix: often stays 85-95°F overnight → little relief

Nighttime Cooling is one of the biggest practical differences. Phoenix just does not cool down in the summers (except for the occasional storm).

*AI Tool provided above data which may or may not be accurate
Ah, @Dude, you had to go all spreadsheet! :p

Unrelated, my new favorite quote: If it squirms, it's biology. If it stinks, it's chemistry. If it doesn't work, it's physics. And if you can't understand it, it's mathematics.
 

TrueNorthSport

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I don’t know the BC town/city that Stircrazy is referring to but let’s compare Lytton BC to Phoenix AZ*

There really is no comparison… Daytime temps in phoenix are brutal but there’s no relief at night. It’s just heat day and night - it’s that non-stop heat for months on end which obliterates batteries in phoenix

Average Summer Temperatures

Lytton (June-August)
• Average highs: 86–95°F (30–35°C)
• Average lows: 55–63°F (13–17°C)
• Dry heat, but cool nights

Phoenix (June-August)
• Average highs: 104-110°F (40-43°C)
• Average lows: 80-90°F (27-32°C)
• Very hot days and hot nights

Extreme Heat

Lytton
• All-time record: 121.3°F (49.6°C) (highest ever in Canada)
• Can spike into 100-115°F during heat waves
• These extremes are rare and short-lived

Phoenix
• Regularly hits 110-118°F every summer• F
• Records around 118-122°F
• Extreme heat is routine, not unusual

Nighttime Cooling (Huge Difference)
• Lytton: drops into the 50s-60s°F → homes cool off naturally
• Phoenix: often stays 85-95°F overnight → little relief

Nighttime Cooling is one of the biggest practical differences. Phoenix just does not cool down in the summers (except for the occasional storm).

*AI Tool provided above data which may or may not be accurate
Yikes, most Canadians could not tolerate that prolonged extreme heat of a Phoenix summer !

A couple of unrelated questions >

Where does Phoenix get its water from ?

How does the extreme heat damage an AGM battery ?

Cheers
 

Dude

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Ah, @Dude, you had to go all spreadsheet! :p

Unrelated, my new favorite quote: If it squirms, it's biology. If it stinks, it's chemistry. If it doesn't work, it's physics. And if you can't understand it, it's mathematics.
That’s funny… I liked biology, physics, math and engineering but chemistry not so much
 

jkernitzki

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That’s funny… I liked biology, physics, math and engineering but chemistry not so much
Math annoyed me, physics entranced me, biology lost me, but I owned chemistry. It just... conformed. Componds and solutions in particular ratios always did what you wanted them to. I'm amazed I didn't turn out to be a mad bomber or Walter White.
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