When should E tool batteries be replaced?

The correct time to replace E tool batteries is when they are down to 2 bars. At this level, the battery is nearing a state where its performance can start to decline. It’s important to ensure that tools operate at optimal capacity, especially in a work environment where the reliability of equipment is crucial. Waiting until the battery is fully depleted, or until the indicator shows a more severe decline, such as the battery light turning red, can lead to interruptions in work or even damage to the tool if it operates under insufficient power. By replacing the battery at the 2-bar mark, you maintain the tools' efficiency and reduce the risk of downtime.