The Milwaukee M18 B5 battery features REDLINK intelligence, as well as surge protection that efficiently protects the device from damage. Built-in temperature management keeps the Milwaukee M18 B5 battery at the ideal working temperature for optimal life. Furthermore, the M18 B5 has a cell separator, as well as 20% more energy and 2x more frequent charging cycles, which guarantee effective long-term work. • Intelligent Control: REDLINK Electronics™ • Overload Protection - Prevents the user from accidentally damaging their investment • Temperature Management System - Keeps the battery in the ideal temperature range to ensure maximum service life • Single Cell Monitoring - Ensures optimal charging and discharging for maximum service life Manufacturer designation - Ensures optimal charging and discharging for maximum service life • Temperature Management System - Keeps the battery in the ideal temperature range to ensure maximum service life • Single cell monitoring - Ensures optimal charging and discharging for maximum service life