The short answer is that the in-seat power systems are not intended to be used.

Or at least, that's the way they were designed.

The outlets have very low current limits. Go over the limit, they shut off. Things that go over the limit include... pretty much everything.


Your best chance of success is don't try and charge a battery and use a laptop at the same time, and plug in your adapter first and then wait a bit for the capacitors in the adapter to charge up before plugging your adapter into your device.


I also carry a separate power adapter for my laptop that I know maxes out at 65W just for use on airplanes. Usually works, but if my laptop is on, only charges the batter a couple of percent per hour.