Yaris MK4 12 volt battery is fitted with cell caps

[Derek.w]

Yes you can top up this Battery its not seal for life type unless its had a replacment fitted.

  Note no pressure valves inside cap but a hole is visable indetween the two lids just to vent gases across from top to bottom then out via the vent tube thats not shown.

[Graham47]

I thought you had replaced the Battery in your Yaris ?
If so, doesn’t what you are saying only apply to that particular (brand of) Battery ?

[Cyker]

I should add that just because it has plugs does NOT mean you should add water to it; My dad made that mistake in his old Merc, thinking the water levels were too low, and ruined a very expensive 12v Battery!!

 

[Derek.w]

Cyker if I can see the metal plates uncoverd then the level is low!!.

On 6/11/2023 at 10:02 PM, Graham47 said:

I thought you had replaced the battery in your Yaris ?
If so, doesn’t what you are saying only apply to that particular (brand of) battery ?

Yes I replaced the Battery but I can still use the Battery for other projects. Its still the Battery brand and original battery that was fitted during car assembly in the Toyota plant so somethink to keep in mind if you are thinking of looking after your battery.

[Derek.w]

23 hours ago, Cyker said:

I should add that just because it has plugs does NOT mean you should add water to it; My dad made that mistake in his old Merc, thinking the water levels were too low, and ruined a very expensive 12v battery!!

 

Cyker if I can see the metal is above the water line then I rather add a little water but to be honest I also pinched some out of adjacent cells just to keep what I was adding to the two outer cells to a minim.

[Bernard Foy]

30 minutes ago, Derek.w said:

Cyker if I can see the metal is above the water line then I rather add a little water but to be honest I also pinched some out of adjacent cells just to keep what I was adding to the two outer cells to a minim.

Robbing Peter to pay Paul 🤔 I assume that you used a syringe of some sort!!

[Derek.w]

29 minutes ago, Bernard Foy said:

Robbing Peter to pay Paul 🤔 I assume that you used a syringe of some sort!!

Yes a very small syringe its max capacity is 5ml.

[TonyHSD]

Is that the original Battery of mk4 located under the rear seat? It’s a Turkish brand, highly rated btw in Eastern European countries. I haven’t tried myself but my dad says he is thinking to buy one for his car. Just strange the Battery has liquid inside, where previous gen were agm. 

[Cyker]

9 hours ago, Derek.w said:

Cyker if I can see the metal is above the water line then I rather add a little water but to be honest I also pinched some out of adjacent cells just to keep what I was adding to the two outer cells to a minim.

Maybe, but my dad did the same thing for the same reason (i.e. metal above the water) and the Battery died after a few weeks, so be careful!

 

54 minutes ago, TonyHSD said:

Is that the original battery of mk4 located under the rear seat? It’s a Turkish brand, highly rated btw in Eastern European countries. I haven’t tried myself but my dad says he is thinking to buy one for his car. Just strange the battery has liquid inside, where previous gen were agm. 

Yup, 12 Battery is under the rear seat, on the right-side. Next to the traction Battery!  

I also thought it was very odd they'd gone back to normal flooded cells, when AGM was the norm in previous cars, supposedly for safety reasons and it being inside the car.

[Derek.w]

10 hours ago, Cyker said:

Maybe, but my dad did the same thing for the same reason (i.e. metal above the water) and the battery died after a few weeks, so be careful!

 

Yup, 12 battery is under the rear seat, on the right-side. Next to the traction battery!  

I also thought it was very odd they'd gone back to normal flooded cells, when AGM was the norm in previous cars, supposedly for safety reasons and it being inside the car.

Its far from a normal Battery its of a twin lid design and vented to the outside of the cabin.

[TonyHSD]

But it is liquid inside, not agm. In this case can I fit a similar Battery instead of agm to my Auris in the boot and of course with a vent tube? There is a cover over the Battery which is pretty much as safe as is on the Yaris under the seat. Interesting, why Toyota switch to liquid filled batteries. 

[Cyker]

Cheaper?? They're worse than AGM in almost every other way...

[Derek.w]

1 hour ago, TonyHSD said:

But it is liquid inside, not agm. In this case can I fit a similar battery instead of agm to my Auris in the boot and of course with a vent tube? There is a cover over the battery which is pretty much as safe as is on the Yaris under the seat. Interesting, why Toyota switch to liquid filled batteries. 

AGM Battery is in the Yaris cross and Yaris MK3 I beleve.

MK4 Yaris is fitted EFB calcium Battery it can also be

with a SMF (seald Maintance Free) Battery double lid both using Ca-Ca technology.

 

[RickyC]

1 hour ago, Derek.w said:

AGM battery is in the Yaris cross and Yaris MK3 I beleve.

MK4 Yaris is fitted EFB calcium battery it can also be

with a SMF (seald Maintance Free) battery double lid both using Ca-Ca technology.

 

Anchorman shown its Battery and is the same EFB Mutlu Battery, and he has a Cross.

[TonyHSD]

9 hours ago, Cyker said:

Cheaper?? They're worse than AGM in almost every other way...

Haha, yes. £160 oem vs £60 Bosch non agm, other than that same size and specs. If it’s safe to do so and work as the original why pay £100 more. 🫢

I don’t need for the moment but just me thinking especially when there is probably not much life left in the car in general.
Yesterday I started after 5 days inactivity and Battery was 12.2v when unlocked, then in ON mode to connect Carista few more minutes the Battery went down to 11.7v , stepped on the brake and push the start button Battery went down to 11.0v , the car started as usual and immediately went up to 14.7v then steady 14.4v shown on the app while in ready mode.
After 40 min in ready mode , switched off and measured 12.9v., and that was the same last time, and slowly goes down to 12.2v when the car is not used every day. Here some photos.
Btw if you keep the car in ready mode and would like your hybrid battery to be topped up you should have AC ON , otherwise if it’s off or the hvac is completely off the car will keep engine off and hybrid battery will remain at low charge, perhaps be better slightly higher charged when leaving for a while, to make sure the car will have enough power to start the engine.
Last  time 3 weeks didn’t touch the car and the hybrid battery was almost full and it was exactly the same when I started, but when I left for 5 days without use and battery was 3 bars when I started there were only 2 bars remaining. Maybe your cars will act differently but that my experience with my Auris. 

[Cyker]

Hmm, interesting - Mine won't run the engine with AC on until it drops to 3/8 bars, then it'll run just long enough to get it to 4 bars and shut off again.

The only way I've gotten it above 4 bars is to be driving fast enough the engine has to stay on for an extended period (But not so fast that the engine doesn't have plenty of left-over work to charge the traction battery) or go down a fairly long and steep hill!

 

[Dala]

9 hours ago, TonyHSD said:

Haha, yes. £160 oem vs £60 Bosch non agm, other than that same size and specs. If it’s safe to do so and work as the original why pay £100 more. 🫢

I don’t need for the moment but just me thinking especially when there is probably not much life left in the car in general.
Yesterday I started after 5 days inactivity and battery was 12.2v when unlocked, then in ON mode to connect Carista few more minutes the battery went down to 11.7v , stepped on the brake and push the start button battery went down to 11.0v , the car started as usual and immediately went up to 14.7v then steady 14.4v shown on the app while in ready mode.
After 40 min in ready mode , switched off and measured 12.9v., and that was the same last time, and slowly goes down to 12.2v when the car is not used every day. Here some photos.
Btw if you keep the car in ready mode and would like your hybrid battery to be topped up you should have AC ON , otherwise if it’s off or the hvac is completely off the car will keep engine off and hybrid battery will remain at low charge, perhaps be better slightly higher charged when leaving for a while, to make sure the car will have enough power to start the engine.
Last  time 3 weeks didn’t touch the car and the hybrid battery was almost full and it was exactly the same when I started, but when I left for 5 days without use and battery was 3 bars when I started there were only 2 bars remaining. Maybe your cars will act differently but that my experience with my Auris. 

What was the voltage drop in 5 days to 12.2V?  Fast first day and then slow?  Or 0.1V every day?

[TonyHSD]

46 minutes ago, Dala said:

What was the voltage drop in 5 days to 12.2V?  Fast first day and then slow?  Or 0.1V every day?

I didn’t measure after the first day, just after the 5th,  perhaps goes down everyday slowly. I also unlocked and locked few times, open doors , boot and walk around the car with key in my pocket every day. It’s an old Battery but seems it’s still holding it until I leave it longer and dies. But I will keep in ready mode once every 5-7 days.