It depends on the airline but most long haul flights have mains power available in some or all seats. Regional flights tend not to have power outlets on board.
Check the airline's web site to look up the facilities offered on each type of plane they operate.
Turn down the brightness, plug the laptop into a power source. There should be a "power saver" setting in the control panel.
The beep indicates that the power is connected. BTW - try this out, unplug the power from the outlet and plug just the power to the laptop. Notice, the beep will still sound.
That is a transformer, it lowers the voltage coming from the plug to a lower voltage that the laptop can handle.
The type of plug typically used for connecting Christmas lights to a power source is a two-pronged plug.
Your screen goes dim because all the energy from the battery in the charger goes into you're laptop so when you unplug it. It goes dim but there is ways you can fix it that how my laptop works.
When you plug it in the beep indicates so. You can make sure to stand still and check the battery.
The laptop charger may be broken and unable to power your laptop.
Docking stations allow you to plug a laptop into a standard desktop peripherals without plugging them directly into the laptop. Computer docking stations are central hubs where you can plug in a laptop to a power supply, a monitor, a keyboard, speakers and a mouse.
swag
There is, but you'd have to remove the top cover. If the laptop won't turn on try this. Remove the power cord, remove the battery. With the battery out, plug the power cord back in. Try turning the laptop on. If it comes on, then you can put the battery back in.
It should have come with a cord. One end will plug into your iPod and the other will plug in to you laptop.
a grounded power source