What laptop? My XPS refuses to charge in any way below 45W, but any cell phone charger I've seen can trickle charge my Macbook Pro (slowly, or with lid closed, or something)
That's interesting, my XPS 15 9575 can charge from seemingly almost any power supply, including those 5V 2.4A USB wall warts, as long as it's off or the lid is closed. I do have to connect the charger after it enters sleep mode though.
XPS 13 here, it does happily accept any 45W+ charger but the "charging" light does not turn on and in Windows, does not display anything like "plugged in but not charging" for anything less. I'm not sure why this is or if it actually does trickle charge while completely powered off, just not showing it
