AOYAN M18 18V Battery 9.0Ah Replacement Battery for Milwaukee M18B9 48-11-1890 48-11-1850 48-11-1820 48-11-1828 48-11-10 XC Red Lithium-ion Cordless Tools Battery (9.0Ah) Voltage: 18V/ Type:Li-ion/Capacity:9000Ah Electronics control charge & discharge analytics to optimize performance and extend life. Integrated microchip prevents Over-discharge, overload and short circuit protection. No memory effect, can be charged or discharged as needed without loss of capacity. Products are CE certified, tested before leaving the factory. Reliable service life, really capacity, long-lasting performance, Long Cycle Life and Low Internal Resistance. AOYAN offering a 30-day Money Back Guarantee and 1 Year Warranty under normal use conditions. Any question, please do not hesitate to send us messages, we will answer your question in 24 hours.