That datasheet is for just the relay which is on the board not the board itself.

It looks like, as Richard said, you can drive it direct from the EZ-B (as per my first reply) however check to make sure it does have the driving transistor and diode otherwise there is a risk of damaging the board, the EZ-B and the battery.

If in doubt, add a driver circuit. This would be the TIP122 circuit with the optional diode.

Or if you are feeling brave and want to risk the warranty on the EZ-B you could just try it and see what happens however I don't recommend that option personally

If you really want to be sure you could always test it with a multimeter first to see how much current (at 5V) the relay uses to close...

@Richard, with no diode there is a chance of back feed from inductive loads. You don't want back feed into a LiPo battery... You don't want back feed anywhere to be honest

Any which way, I have a couple of transistors(don't ask where I got them from) that are 2n2222 transistors. 2n2222

Will these work? Added picture of pin layout

@Rich, I guess I didn't even realize it or even thought about it as have only been using niMh batteries in most of my projects... Still, good to know... Thanks...

Will those transistors I mentioned in my last post work?

I know I've arrived late in the game but I purchased several of the 5 volt relays for use with one of the Roomba projects (not completed yet) but I did post some info about them a few months back. One key reason for my selection was that the relay boards are optically isolated from the EZB or any microcontroller for that matter. Also on ebay: http://www.ebay.com/itm/5V-1-Channel-Relay-Module-H-L-Level-Triger-with-Optocoupler-for-Arduino-Raspberr-/221407959915?pt=LH_DefaultDomain_0&hash=item338cf15b6b

@TechnoPro Just wanted to chime in that a 2N2222 is perfect for this application, and a 1N4148 or 1N4001 should work for a fly back diode.