12V Battery
Hoping someone knows the answer. I use several accessories through my Motorsport hobby which connect directly to the 12 Volt Battery which over the period of a day will drain the Battery - whether enough to reduce the Battery voltage to cause starting problems I don't know. In my previous vehicles I'd start and run engine for say 20 minutes occasionally to top up battery and to get some heat into the car to warm us up! - I'm assuming this is not possible in my new Prius as it seems to turn off t
The good news is that the 12V Battery doesn't get used to turn the engine. The massive HV Battery does that. So you only need enough charge in the 12V Battery to power up the control systems. The bad news is that because of this, the gen3 battery isn't as meaty as a normal car battery. You might also want to find where the jump terminals are in the Prius in case you need them. :) Have read of this... http://priuschat.com/forums/gen-iii-2010-prius-accessories-modifications/74916-adding-seconda