Generally, non smart phones with smaller screens will give you the best battery life; battery capacity is another factor : higher the capacity, longer the lifetime (battery capacity is indicated by a mAh rating , though voltage also matters but usually not considered)
Smart phones with large touch screens normally have a very low battery life (usually a day or two at most). And it also depends on your usage patterns : i.e Lot of data usage though Wi-Fi or 3G, BT hands free use, games, music etc..
Smart phones with large touch screens normally have a very low battery life (usually a day or two at most). And it also depends on your usage patterns : i.e Lot of data usage though Wi-Fi or 3G, BT hands free use, games, music etc..