Arduino battery

How to connect Arduino board with DC batteries?

You can connect the Arduino to a DC battery by connecting the negative (-) terminal to the Vin pin on the Arduino board and the positive (+) terminal to a Gnd pin (ground).

Moderator edit: this is complete nonsense. If it was meant as a joke, it isn't very funny. Ignore this post.

goodinventor:
You can connect the Arduino to a DC battery by connecting the negative (-) terminal to the Vin pin on the Arduino board and the positive (+) terminal to a Gnd pin (ground).

Sounds to me like that would totally fry the arduino board…

Surely you must mean connect battery - terminal to arduinos GND terminal and battery positive terminal to Vin, so it goes throw regulator on board…

goodinventor:
You can connect the Arduino to a DC battery by connecting the negative (-) terminal to the Vin pin on the Arduino board and the positive (+) terminal to a Gnd pin (ground).

WTH!!???

please remove or update this comment, as to not pass around bogus info to new users.

You can use a battery pack and connect it to a DC power jack.
This is the kind of thing you could use:
DC barrel jack
You can also get a 5v battery pack (like the kind used to charge phones on the go) and power through the USB connection. I personally use this one available from Adafruit. They also have others which work with Arduino (as they say, any pack with 5v should work).