EcoZi - Battery Saving Search - will work in theory only if you have a Phone with an AMOLED display. In that case it take less battery juice to display blacks than other colours.
LCD technology is different where it takes the same amount of power to display any colour. If you want to conserve battery, turn your brightness as low as possible. All DROID phones by Moto use LCD screens to date.
Besides....if you did have an AMOLED screen, which you don't..... how often do you stay at the search page anyways?......long enough to type a query in. The results are all in white anyways........
EcoZi - Battery Saving Search - is just a gimmick IMHO