What is the maximum wattage/amperage the Magic Mouse 2 can consume?

Using a USB voltmeter (at @n1000's recommendation), this is the Magic Mouse 2 consumption rounded to the nearest 10th:

0.5 Amps (2.5 Watts) while switched off

Apple mouse charging while off

1.5 Amps (7.5 Watts) while switch on

Apple mouse charging while on