Works but disturbance of powered speakers and not grounded cable here.

Works but disturbance of powered speakers and not grounded cable here.

85W power supply Magnetically for Apple MacBook Pro with Retina Display from 2012/2013 models - Original Lavolta Notebook Charger - 20V 4,25A (Electronics)
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Customer Review

I have it now for 2 months and it works without failure or abnormalities.

However, it is not so well filtered as the Apple original. If you connect active speakers on the Macbook, then it roars perceptible from the speakers. With original Apple power supply that does not happen.
Second minor drawback is that it is delivered only as a bipolar power supply.
The earthed cable that comes with the original power supply, this adapter is not, you can connect however.
Grounding is needed when you can feel by the low leakage current when two-pole power supply a tingling sensation when you touch the notebook. The disappears when the power supply is grounded.

All in all, a useful replacement for a reasonable price.

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