Hi,

I took the plunge and got a two year old Rx400 SE-L. I got it on Friday

afternoon from the dealership and drove it home (about 45 min drive). I

fiddled around with the navigation/bluetooth stuff when I got home for up

to 1 hour and all in all was pretty happy with it.

However..., come the following day I go to use it and the auxiliary battery is

flat and it won't start!

Unbelievable.

I know the battery isn't that powerful but is that really enough to flatten a

normal serviceable battery? If so I'm either going to have to be very careful

what I do when the engine is off or use the "no quibble return policy"!

I still can't believe I needed the RAC on my first day of ownership!

Unity

i guess the battery isnt very good - as u say auxillary battery i assume u have the hybrid version? if so i hope you know u can not leave the car parked for more than about 10 days otherwise you cant start the car! look in the 400 forum and there is a long post about it.

Yes, its the Rx400h hybrid. I left it overnight after a half hour run and it did start this morning. Not sure I want to keep playing Russian Roulette with "will it - won't it start" everyday.

Yes, thanks I'd seen the posts on it flattening after 10 days or so, which I can probably live with. Can't say the same if it happens after a few days though. I'll have to see what it does. I'll be straight on the phone Monday morning to the dealership

Is that true? Does that mean it doesn't have a normal battery as well? Seems bizarre, surely there should be an override that if the batteries are flat, it should just start the engine using a normal battery like a normal car............

To the OP, defintely sounds like there's something weird going on with your car, we've got a Prius (which isn't exactly the same I know) but the battery doesn't die by just sitting in it for an hour.............