Okay guy came round (sent a local mech) and mentioned that they dont normally touch hybrids (which is fair enough they are not typical cars) any way he still jump started the battery and car came on straight away with 4 blips on the battery, that could have been from his charger though.
Your will have two separate batteries, a HV (High Voltage) Battery, and a 12V Battery. If you only have one display, then it would only display the SoC (State of Charge) of the HV Battery. The local mechanic would only have jump started the 12V battery, he would not have attempted to go anywhere near the HV orange cables or battery, and you may have had a dead mechanic to explain to the authorities if he had tried to jump-start the HV battery!
drove about for 20 minutes never using the electric (thats going to mess my mpg this fuel up )
Hopefully it should be fine in the morning, i hope its not something wrong with the car, if it happens again (like tomorrow) i think i will contact Toyota.
I think this is unlikely (although it may be difficult to tell) because it takes a long time to fully recharge a flat 12V battery. Did anything reset such as the clock or mpg?
I have a theory on why it might have gone. If the starting battery is what operates the door opening/closing is not connected directly to the hybrid motor.... ie its the 12v battery, and that when using the electric battery the car wont charge up the 12v.... then here is what happened yesterday.
FIrst off i used a 12v socket tyre compressor to pump my tyres up, i then used a 12v vacuum to give car a quick once over.... i then cleaned the car with the keyless entry key in my pocket (which caused the wing mirrors to keep moving back and forth as the car opened and closed). I then drove only 8 miles to fill up the car and abused the hybrid battery along the way as per normal. I came home and left the car for 36 hours.
So my basic guess is that the starter battery is not getting charged up when on electric.... and hence with natural discharge and lots of use of the 12v it caused the problem. .....or i have a dodgy alternator ?
As Cootuk said, the 12V battery will charge as long as the car is in READY mode, it doesn't matter whether the car is being driven on electric, petrol or both, or just sitting in traffic or on the driveway.
Using the accessory modes is generally not recommended for any period of time, including sitting in the car listening to the radio - it is always better to have the car in READY mode with the awareness that the petrol engine is going to periodically start/stop - better to use a small amount of petrol than have a flat 12V battery.
Or it could be what you guys said and the boot light was on... i did take some stuff out the boot to empty it, so that is quite plausible. That sounds a good idea Sag, can you link me what type of charger you brought? I will have to check to see if i can turn the boot light off
It is never easy to tell whether a 12V battery has gone flat due to accidentally leaving a door slightly open or an interior light left on, OR through slower misuse via the accessory mode (I've always wondered why Toyota included these modes when it can shorten the life of the 12V battery?).