If you drive the car every day or leave it parked for max 2-3 consecutive days, you won't see the problem and the factory battery will last the normal 4-5 years for a starter battery. However, if you regularly leave it parked for a week at a time, the factory battery will only last 2-3 years. This is why people have been recommending deep cycle batteries and higher capacity batteries. I still can't figure out why Toyota put the smaller Group 35 battery in from the factory when the ICE variants like the V6 uses the 24F. Maybe they were stuck in the ICE thinking and the EV doesn't need the cranking amps of the 24F.asavage said:miimura said:Yes. The car has a larger than usual drain on the 12V when parked. This was evident from the start when cars would be dead sitting on dealer lots. This situation also caused many people to have a factory 12V battery that had a short life due to it being drained dead before even being sold.
Thanks for that. I'd only read about the many premature 12v battery failures, hadn't seen this before.
I run the Odyssey 34R-PC1500T + the Group 34 height spacer to correct the fit. The combo is a bit over $300. I own three of them for some of our vehicles (RAV4 EV, Sienna, another Sienna), they seem OK so far. The oldest one is in the RAV4 EV, and will be three years old in August.