Just to clarify, that wasn't the point I was trying to make. The point is that Dell is using a much smaller battery, Windows (uses more battery in comparison to

Just to clarify, that wasn't the point I was trying to make. The point is that Dell is using a much smaller battery, Windows (uses more battery in comparison to MacOS), a high-end / high TDP CPU and still managing 5 hours. Apple would be able to manage the 10 hours. Using SO-DIMM DDR4 (1.2v) would sacrifice a few mm of thinness and a few minutes of battery life at best.