10 K Service, less than impressed! dealership misery!

I've never seen anything from Toyota, stating their reason for using AGM, but the consensus here was that being in the cabin was the reason: less chance of spillage (in an accident), or venting of noxious or explosive gas.

Quite the flip-flop now. Maybe regulations changed, or they found a loop hole?

I agree though, more'n likely the usual motive: cutting costs by cutting corners..

 

Those are good reasons to use one. The less wear from deeper depth of discharge is also one when using a lower capacity battery.

Good reasons aren't requirements though. AGM came out in 1980, and wasn't used in cars until later. Plenty of models had the starter battery in the cabin before then. Plus, Toyota would have to pay to have the venting even with AGM.

The cost difference between AGM and a floodie is something that could show up in the MSRP.

 

I called the service departments of two dealers to confirm the type of battery, because my battery maintainer had settings for flooded cell, AGM and lithium. They both told me it was AGM. No one would know for sure without dissecting the battery.

 

I think it’s on the battery case, not positive

 

If it was AGM I think the label would say?

FWIW: an AGM can be charged using a smart chargers “regular” cycle; the only diff with AGM is you can charge at slightly higher voltage, and it’s advantageous to do so.

 

It says "never add water" on Prius AGM batteries. It says "add distilled water" on Prius flooded-cell batteries.

 

Since when do dealer part departments know anything about the internal construction of parts?

GS Yuasa makes AGM (VRLA) batteries only in JIS sizes B20 and B24 (Gen 2 and Gen 3 Prius 12-V-battery sizes). They don't make any AGM (VRLA) battery in EN/BCI/DIN sizes.

https://www.gs-yuasa.com/en/products/pdf/YUASA_Automotive_Battery_Made%20in%20Japan.pdf

Automotive & motorcycle batteries｜GS YUASA

 

FWIW: You may actually want to research that a little more. Yes, you CAN do that. Is it the wisest choice? I’ll let your research answer that question for you.

I’ve got an idea for you (since you’re convinced it’s an AGM): remove the battery from your car, turn it on its side and see what happens. Then report back to us about what you learn. This is, of course, assuming you actually have access to a battery in a 5th generation Prius.

AND you apparently still haven’t looked at this battery yourself. Interesting. Assuming you actually have access to it.

 

Actually the Gen 5 battery along with most their other EN batteries is spillproof as stated by GS Yuasa due to the double-lid construction.

There is a 0% chance that it is AGM because the Gen 5 battery on its label explicitly states that it is flooded-cell ("add distilled water").

 

My point EXACTLY! So either there is no Gen 5 available to this poster, or…..?

 

that's because they don't want you to extend the life of agm, but want you to help flooded make it past warranty

 

Never let facts interfere with your beliefs (or at least that’s the current thoughtless pattern. OOPS, guess that’s supposed to “thought”, but reality creeps in once in awhile ). Paranoia runs deep, as they say.

 

And the biggest examples are antivaxxers and global-warming deniers these days.

 

The label also states "do not tip". Leak proof or not, flooded needs to be upright to work safely. AGM can be mounted on their sides, just not upside down.

 

The same dealers that have done a terrible job solving your problem? Why are you trusting anything they're saying any more?

In fact, if they're convinced it's an AGM battery(it's not), they might not be testing it correctly. They should be using a DCA-8000 Battery Diagnostic Tool in the Advanced Battery Test Mode. They're supposed to use the scanning tool to scan both the VIN and battery barcode, but if they're manually entering the battery data, it should be the following:

CCA
Flooded
285
Customer Complaint - Yes

It's been said a dozen times so far, but the battery in both the gen5 Prius and Prius Prime is a GS-Yuasa 345LN1-MF which is a variant of their Y6-355LN1. All the GS-Yuasa Y6 batteries are flooded.

https://www.gs-yuasa.com/en/products/pdf/Y6_for_General_passenger_cars.pdf

 

You probably realize this, but, you are probably confusing Paul (assuming “he” actually exists) with the facts.

 

From my CTEK 4.3 users manual:




And this is from my older CTEK 3300 charger manual:



I've seen other mention (can't find at the moment), that even rectangular case AGM batteries should use the regular charging program, that it's only the spiral-wound (6-pack style) AGM's that can benefit from the slightly higher charging level. Never the less, you can charge any-and-all AGM's with the regular program.

 

Sorry, it's just too much for me to believe that Toyota is giving us flooded cell batteries without telling us.

 

Do you even own a Prius Prime?

 

You think I'm lying too?