Flylinktech 3.0Ah Replacement M12 Battery for Milwaukee 12V M12 48-11-2440 48-11-2402 XC Lithium-Ion Cordless Tool Battery Pack 12v 3000mAh Replacement Battery for Milwaukee 48-11-2440 M12 Battery. Compatible with 48-11-2420 48-11-2440 48-11-2401 48-11-2411 48-11-2402 48-11-2412 C12 B, C12 BX. No memory effect,Can be charged or discharged as needed without loss of capacity. Battery features overload protection and optimized performance,battery and charger. We promise our products 30 days money back, 24 hours service.