Amazon.com: Janllenton 18V 10-Cells 18650 Battery DIY Replacement Case for Milwaukee M18, Plastic Battery case Replacement Repair Kit for Milwaukee M18 3.0Ah 4.0Ah 5.0Ah (Battery not Included) : Tools & Home Improvement
Sent my 6ah Battery in for repair since it wouldn't charge past 3 bars and showed the Christmas Lights of death on my charger. Got a new one sent back to me