Thanks again for the info Dave.

> You'd actually be better off to pick batteries closer to 5V.
> Everything above 5V is wasted as heat in the voltage regulators. A
> 5-cell NiCad or NiMH will run from around 7V fully charged down to
> about 5V when discharged.

It's interesting that you say this because this is what I thought based on the documentation. However I find that if I don't have close to 9V then my WiFi doesn't work. In fact i was originally using a 6V battery but had to change batteries because of this problem. Not sure what I am doing wrong.