MaximalPower Power Tool Replacement Battery for MILWAUKEE 2.4V 6538-1, 6539-1, 6539-6, 6540-1, 6545-6, 6546-1, 6546-6, 6547-1, 6547-22, 6550-20, 48-11-0100 Amazon.com is the only authorized dealer selling MaximalPower brand products. Please make sure your item is ONLY sold and shipped by Amazon.com! All other marketplace vendors are selling counterfeit products that do not perform the same, and/or are not covered by our MaximalPower Warranty. Replaces the OEM battery part numbers: Milwaukee # 48-11-0100 Battery Type: Ni-Cd. Capacity: 2.4V 2000mAh (Will NOT affect battery compatibility) Integrated microchip prevents overcharging and lengthens battery life! 100% Compatible with original manufacturer equipment