In mobile phones similar optimizations where done at least when battery sizes were well below 1000mAh. I think race to sleep was very competitive. So you run at

In mobile phones similar optimizations where done at least when battery sizes were well below 1000mAh. I think race to sleep was very competitive. So you run at full power for a short time and then you go to a deep sleep mode. Discaimer: Have not worked with mobile phones for 10+ years.