You can use the Wattz app to monitor current/power flowing into/out of the battery on some Android phones. Yes, 3 W is about the average in normal use. Unfortunately you cannot gauge the power consumption while charging unless you have a USB wattmeter too: the system only measures battery current because it’s required for battery capacity/percentages.
Your entire backlight is only 3w? I feel like my phone is over 3w.
You can use the Wattz app to monitor current/power flowing into/out of the battery on some Android phones. Yes, 3 W is about the average in normal use. Unfortunately you cannot gauge the power consumption while charging unless you have a USB wattmeter too: the system only measures battery current because it’s required for battery capacity/percentages.