Anyway to prevent the radio from powering off during ignition?
Have the HON BT35 Bluetooth model and it disconnects when going though the ignition.

Also, anyway to give constant power to the DC power outlet in the car?
I wanna be able to leave a small mp3 charging in the car.

 

as for constant accessory power during ignition, i dont think so.


also the battery is small so it's best you dont drain it. your battery will last longer.

 

You can wire unswitched power from the battery to the power supply wire of the radio.

 

Like spreadhead mentioned as quoted below, you could also do the same for the auxiliary power port. Or you could just buy a new one and use an add-a-circuit/fuse to the fuse box in a fuse that receives constant power regardless of ignition position. On my USDM GD3 fuses 18 and 19 I think were constant.

 

How would I go to do this?

 

Well, I want the radio to be off if the car is completely off, because like kenchan mentioned I think constant power (even when the car is off) will kill the battery quickly... since the Fit does have a small battery.