Panasonic 14.4v 4.2AH Battery (EY9L45B57)

14.4V 4.2Ah Li-ion battery pack offers long-lasting performance and reliable durability.

High performance battery capacity

The 4.2Ah Li-ion battery packs are capable of approximately 27% more working capacity per charge than the previous model, meaning you can get the job done faster.

Individual monitoring of battery cell voltage

A sensor to ensure optimal discharge control, preventing both overcharging and over discharging, monitors each 3.6V segment.

Over discharge prevention sensor

A sensor works to prevent over discharging that can occur with the discharge of the battery until voltage falls below a minimum threshold (a problem that is common to lithium ion cells).

Battery overheat protection sensor

A temperature sensor cuts off power to the motor before the battery temperature rises to a harmful level and flashes a warning lamp on the tool’s control panel.