What's the maximum charging speed for the Samsung Galaxy Tab A9 with the Samsung 25W Power Adapter?

Up to 15W via USB PD, assuming you're using an adequately rated cable.

Do I need a special cable for this combination?

Any standard USB-C cable rated 3A or higher works fine — no special "e-marked" cable needed at 15W.

Not among the chargers we recommend for it — the Samsung 25W Power Adapter already delivers the Samsung Galaxy Tab A9's full 15W ceiling.

Yes — this combination fast-charges at up to 15W via USB PD.

Both sides speak USB PD, and the Samsung 25W Power Adapter delivers enough power for the Samsung Galaxy Tab A9 to hit its full 15W ceiling.

The wattage above assumes an adequately rated cable. Here's what actually happens with three common cable situations:

Cable	Real wattage	Cable-limited?
Standard 60W-rated cable (3A, not e-marked)	15W	Not the bottleneck
100W / 5A e-marked cable	15W	Not the bottleneck
Unrated / unknown cable (assume worst case)	15W	Cable-limited

What's the maximum charging speed for the Samsung Galaxy Tab A9 with the Samsung 25W Power Adapter?: Up to 15W via USB PD, assuming you're using an adequately rated cable.
Do I need a special cable for this combination?: Any standard USB-C cable rated 3A or higher works fine — no special "e-marked" cable needed at 15W.
Is there a faster charger for the Samsung Galaxy Tab A9?: Not among the chargers we recommend for it — the Samsung 25W Power Adapter already delivers the Samsung Galaxy Tab A9's full 15W ceiling.

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