If you have an Android phone it does have a breakdown. The couple times I've looked at mine it was screen and radios (wifi, cell) active/standby. But I think th

If you have an Android phone it does have a breakdown. The couple times I've looked at mine it was screen and radios (wifi, cell) active/standby. But I think that is not important. As programmers, we look at the overall and can pick and choose parts to consider for optimization. Hardware isn't quite so general -- ARM needs to be ready in case a breakthrough in screen or radio battery usage leaves the CPU being the power hog.