It's all very well listening to advice on ways to cut down the power used by your smartphone, but have you ever seen the power savings quantified? Can you put numbers to the various techniques and settings? You can now, with my handy guide. Although testing was on a Nokia N96, the findings should apply to any Symbian-powered smartphone.

"Thanks to Nokia's handy (free) utility, Energy Profiler, currently found being promoted in the Ovi Store, I've been able to do a number of tests to work out the power drain for various common phone attributes. Are there any big battery killers that should be left off if possible?"

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