tim macfarlane

I have just replaced my AGM auxilliary battery with a similar battery from Tanya which is the red top one in the image. The Toyota manual suggests the battery should be an S55D23R however that is too tall at 200mm to fit under the drivers seat. The redtop battery fits at 170 mm and is what was already in there. Also the battery costs between £150 and £200 rather tha £300 for the S55.

Thank you I will go and see where I can get one

I checked on AI and they confirm that the battery that I need to replace being the one I show in the image is a battery which manages the electrics for a hybrid vehicle which is why I get no response at all when I turn on the ignition as it only registers 5V on the meter. So it would seem I need to replace it with the same type S55D23R-B if I can find one!!

While driving my 2007 alphard hybrid camper van conversion there was a loud bang and a steam like vapour was emitted from below the drivers seat. I took it to my toyota garage and they changed the main battery below the central console but didnt look at the auxilliary battery below the seat. I was able to drive home but after leaving the van for 5 days everything was dead and even a jump start to the main battery did nothing. I checked the auxilliary battery and found it hs only 5 volts left. I assume I will need to replace it with a new 12v AGM S55D23R-B 57Ah 430 A version. Does anyone know where I might get a replacement in London UK and whether when I refit it should I do further checks on the electrics. Here is a photo of the battery that failed