Milwaukee RedLithium Battery, M12B4, 12V, 4.0Ah

• It has a temperature Management System which keeps thebattery in ideal temperature range to provide maximum life.
• Withindividual Cell Monitoring which ensures optimal charge and dischargefor maximum life and discharge protection which prevents cell damagefrom over-discharge.
• Up to 2X more run time*, 20% more power*, Up to 2X more recharges* *Comparedwith other Lithium -Ion technologies and / or with previous Milwaukeebattery technology.
• Results dependant on voltage, tool and application.
• They also feature a fuel gauge to display their remaining charge.