What does The MeatStick (2020) charger's LED indicates?

When the button is pressed, the LED turns on for 5-8 seconds.
Colors to designate the power level of the 2 AAA charger's battery.
Red = Low power AAA battery (AAA batteries are low)
Green = Power AAA battery (AAA batteries are good)
*If there are no Stick on the charger and the button is pressed, the LED will again turn on (Green/Red) for 5-8 seconds.
However, if no Stick is detected it will Flash Red 5 times quickly.
charger2019 specs
*If you're using rechargeable batteries, red may show earlier and last longer.