Why doesn't the app indicate 12V battery level?

Discussion in 'Gen 5 Prius Technical Discussion' started by Paul Gregory, Jun 15, 2026 at 3:02 PM.

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  1. ChapmanF

    ChapmanF Senior Member

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    If even one time. I've been left once or twice staring at a jump pack that read 100% a moment ago now reading 0% in less time than it took me to step from the engine bay to the door and reach in and try to start the car.

    In my gen 3, I've now taken to disconnecting the battery cable (easy in gen 3, it's right there in the underhood fusebox) if I think the battery might be that drained, then making the car READY with the booster pack, then plugging the battery back in.

    That's harder in gen 1 or 2, with no easy up-front way to disconnect the battery, have to get in the hatch. I don't know the story with the newer generations.
     
    #21 ChapmanF, Jun 18, 2026 at 11:18 AM
  2. Paul Gregory

    Paul Gregory Senior Member

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    My workaround, for now, after I've driven it on a short trip, is to let the car run for an hour until it shuts off on it's own. This way, I'm more assured that the battery is at full charge.
     
    #22 Paul Gregory, Jun 18, 2026 at 1:34 PM
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