so i want to know the difference between active pickups and passive i know that they have higher output and all that but what does this realy mean.
Active pickups have a pre-amp built in so the tone and sound gets shaped slightly before it even leaves your guitar, this upshot of this is that the signal is lower impedance so it travels along longer cables with less signal degradation, has a higher output and the pickups use batteries. Some people think that the tone you get from actives is more sterile and less organic however.
R.I.P. My Signature. Lost to us in the great Signature Massacre of 2014.

Quote by Master Foo
“A man who mistakes secrets for knowledge is like a man who, seeking light, hugs a candle so closely that he smothers it and burns his hand.”

Active pick ups have batteries.

Its likke the difference between using headphones in your comp, and using the speakers that plug in to the wall.
Active pickups require a power source (e.g. Batteries etc) whereas passive pickups don't!
Higher output means it will start to drive a tube amp earlier.

ESP Standard Eclipse I CTM VW
ESP LTD Deluxe H-1001
ESP LTD Deluxe Viper-1000 STBC
ESP Edwards E-EX-100STD
Warmoth Paulcaster "Tiger"
Tanglewood TW170 AS
Vox Tonelab ST
Blackstar HT-1R