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RE: Linear Power Supply or Battery on Mac Mini - pics

The only way I know is by anecdotal evidence, my ears.

Decoupling caps should eliminate these HF droops, but they didn't in this case. If the decoupling is done right, the power supply only sees lower frequency current transients. The voltage droops on the power only get worse as the get to the loads, not better.

Your battery is better than your linear, but that just says that your linear is not very good. I have compared several LI battery supplies with ultracaps on the output to the linear I use. No contest. The fast linear wins every time.


Edits: 12/23/14
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