HV battery voltage difference Dr.Prius vs Torque Pro

Discussion in 'Gen 3 Prius Technical Discussion' started by DimitrisTS, May 23, 2025 at 1:01 PM.

  1. DimitrisTS

    DimitrisTS Junior Member

    Joined:
    Jan 24, 2018
    28
    49
    0
    Location:
    Thessaloniki
    Vehicle:
    2010 Prius
    Model:
    III
    On my 2010 I have an Android head unit and torque pro always running. I am keeping an eye to block voltage difference as an indicator of battery wear and lately I am getting much higher values. Around 0.10 to 0.27 under load while it used to stay at 0.05 or for a short time up to 0.10 volt.
    So I started having Dr. Prius on all time to spot where the problem is. And there the voltage difference is significantly lower around 0.05 to 0.10. rarely it goes up to 0.15 for a second or two.
    So the question is why is there a difference between those two apps and which to trust?

    I also did a battery test and got a score of 88%.
     
    #1 DimitrisTS, May 23, 2025 at 1:01 PM
  2. Tombukt2

    Tombukt2 Senior Member

    Joined:
    Nov 29, 2020
    11,753
    2,080
    0
    Location:
    Durham NC
    Vehicle:
    2009 Prius
    Model:
    Base
    They're just numerals on the other side of a decimal point hardly large amounts at all and on both of the apps the electricity in the batteries doing the same thing just with different numbers behind the decimal point or talking tenths here. 88% battery health I'd turn my attention to I don't know something else probably but I have no idea query the makers of the apps that would probably be the thing to do like you do when your phone's broken and when you see something on your screen that you own that you don't agree with you called the people that control the screen and the numbers
     
    #2 Tombukt2, May 23, 2025 at 1:17 PM
  3. ChapmanF

    ChapmanF Senior Member

    Joined:
    Mar 30, 2008
    26,076
    17,049
    0
    Location:
    Indiana, USA
    Vehicle:
    2010 Prius
    Model:
    IV
    On the other hand, both apps should be asking the ECU in the car what the numbers are and getting digital values back, so a consistent, repeatable discrepancy in what the two apps show would suggest one of them (or both) could be doing some math wrong.
     
    #3 ChapmanF, May 23, 2025 at 5:56 PM
(You must log in or sign up to post here.)