APPLE 45W MAGSAFE 2 MD592B/B

The 45W MagSafe 2 Power Adapter features a magnetic DC connector so if
someone should trip over it, the cord disconnects harmlessly and your
MacBook Air stays put safely. It also helps prevent fraying or weakening
of the cables over time. In addition, the magnetic DC helps guide the
plug into the system for a quick and secure connection.

When the connection is secure, an LED located at the head of the DC
connector lights up; an amber light lets you know that your notebook is
charging, while a green light tells you that you have a full charge. An
AC lead is provided with the adapter for maximum lead length, while the
AC wall adapter (also provided) gives you an even easier and more
compact way to travel.

Designed to be the perfect travelling companion, the adapter has a
clever design that allows the DC cable to be wound neatly around itself
for easy cable storage.

This power adapter recharges the lithium polymer battery while the
system is off, on or in sleep mode. It also powers the system if you
choose to operate without a battery.