Power up your Milwaukee M18B4 18V 4.0Ah RedLithium-Ion Battery and enjoy longer run times and better performance. This genuine ION battery is designed for reliable and efficient charging, with advanced lithium-ion technology that provides a high power output without the memory effect. With a capacity of 4 Ah and a voltage of 18 V, this battery is perfect for all your DIY projects. It is compatible with a wide range of Milwaukee M18B4 power tools and is easy to install. Get your hands on this powerful battery and take your DIY projects to the next level.