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Thread: Car battery testers

  1. #1
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    Car battery testers

    Any thoughts,opinions,experience,recommendations on car battery testers either digital or analog.

    Are the lower cost ones,(under $100) any good or junk?

  2. #2
    Admin ZR's Avatar
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    Best you have these days is a load tester like this.

  3. #3
    Admin ZR's Avatar
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    If you have a battery with removeable tops, checking condition via specific gravity gives you a much better idea of it's real condition and charge.

  4. #4
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    Quote Originally Posted by ZR View Post
    If you have a battery with removeable tops, checking condition via specific gravity gives you a much better idea of it's real condition and charge.
    My antifreeze tester looks like that.
    I had a battery specific tester years ago,but it looked like a long round glass cylinder.
    The rubber bulb rotted out and cracked.

    That would be a lot cheaper than a battery tester.

    What about internal resistance,is that important to know or not so much.
    Would that load tester you showed measure that?

  5. #5
    Admin ZR's Avatar
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    Specific gravity gives better insight as to state of charge and general condition to predict good to go or time to replace.
    Load tester only measure amps available.
    Yes looks very much like a coolant tester.

  6. #6
    shakin shakin's Avatar
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    https://www.princessauto.com/en/batt...RoCs6IQAvD_BwE

    I use the POWERFIST 100A Battery Load Tester. It goes on sale frequently. I believe I paid 16.99.

  7. #7
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    Quote Originally Posted by shakin View Post
    https://www.princessauto.com/en/batt...RoCs6IQAvD_BwE

    I use the POWERFIST 100A Battery Load Tester. It goes on sale frequently. I believe I paid 16.99.
    I have that one too.
    '23 F150 Screw 4x4 3.5L TT Powerboost (Avalanche Grey)
    '21 Explorer ST 3.0L TT (Atlas Blue)
    '14 Mustang GT 5.0L (Oxford White) 4Watling memory car
    '11 Mustang GT 5.0L (Race Red) 8.92 @ 154 mph
    '89 Mustang LX 5.0L (Blue Flame) H/C/I

  8. #8
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    Anyone have or tried a digital battery tester?

  9. #9
    nom nom nom RedSN's Avatar
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    My OBDII scanner does a battery test. Not sure how good it is, but it measures the battery performance during a start-up

    -Don____________

  10. #10
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    Quote Originally Posted by ZR View Post
    Best you have these days is a load tester like this.
    Looks like the one Canadian Tire sells.
    Is that a carbon pile tester?

    Can you load test with the battery hooked up to the car.
    Instructions just show a battery not hooked up.

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