Why has impact driver lost power

The battery sometimes is old and without capacity but you problem more has to do with heat dissipation inside the ancre of the motor part , about 2 or 2.5 years old tool it must be it, the right time to repair replace also the brushes and the motor ancre of it (not the magnet field) is neccesary MUST be replace because when you only replace the brushes its 80% possible that your machine eats the brushes in a few weeks or a few months already again to the same short size .compare the sound listen to it how it sounds now at the moment and replace the motor and brushes and listen to the sound again, well you will hear the difference.
And listen to the machine that it sounds again good and makita parts of the motor is realy cheap and not to expensive compared to Panasonic or Milwaukee . absolut its 70% that this is the right option to get a succesfull repair. but the capacity of the batteries to test is also important in priority . thats the most expensive thing .
but i think the motor and brushes
Succes