Offers up to three times longer runtime, up to 20% more power, and up to twice the battery life compared to other lithium-ion technologies and/or previous Milwaukee battery technologies (results depend on the tool and application). The REDLITHIUM protection with REDLINK digital overload protection prevents users from damaging their investment in cordless power tools in abusive situations. Individual cell monitoring ensures optimal charge and discharge cycles for maximum lifespan. The integrated, welded frame construction of the battery with shock-resistant separators prevents battery failure due to excessive vibrations or drops. Can be used at extreme temperatures down to -20 °C without affecting runtime and battery life. The discharge protection prevents cell damage from over-discharging.