Features: 1.Battery Type: Lithium-ion / Voltage:12V / Capacity:3.0Ah / 6.0Ah / 9.0Ah 2:Compatible with all Milwaukee M12 cordless power tools 3:Premium connector provide steady currect ,a good connector to your tool ,easy to install and remove 4:The ABS+PC plastic material,durable enough to protect the cess inside battery and prevent the damage from outside 5:LED indicator allows you to check the state of battery （When the LED display has only one grid, please charge it in time. Please do not exhaust the battery.） 6:Over-Charge protection / Over-discharge protection / Over-current protection / Short-circuit protection.