Get more battery life out of your Nokia N95-3

Ever since I turned off my 3G data network setting on the Nokia N95-3 which seems to have provided a temporary fix for the bug in firmware 20.2.011 from shutting itself off randomly, I noticed a significant boost in battery run time per charge cycle. I am going on three days with the battery meter showing as full. Is the 3G chip really that draining on the battery?