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How to find parasitic battery drain through a current draw test

Model: (Various brands) Various
Part: Battery

Video tutorial

To do this absorption test we will need a multimeter set to amps. This is a device that we can easily find on any e-commerce platform, for example on AliExpress with code 1005005913916630 at the current price of 9.96 euros, with free delivery.

We put the black cable in the "com" position and the red one in the "ampere" position, putting it in series. We will put the black probe on the negative cable of the battery connected to the vehicle and the red one on the negative pole of the battery.

In this way we are showing an absorption that is sufficient to discharge the battery, so we will have to remove the fuses one by one in order to check where the parasitic absorption is coming from; when it drops to zero, we will know we have found it.


Posted on 24 October 2025 by ScegliAuto


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by ScegliAuto

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