Keep your breast pump powered anywhere with this versatile battery case upgrade. Compatible with Pump in Style Advanced breast pumps, this portable power solution offers convenient battery operation using standard AA batteries - perfect for pumping on-the-go when wall outlets aren't available. The sleek black carrying case provides protection and discreet transport. This battery pack delivers reliable 12V DC power to maintain consistent suction performance. The compact design includes everything needed for battery operation: a durable power pack housing, connection cable, and protective storage case. Ideal for working moms, travelers, or anyone needing a mobile pumping solution. The battery case allows freedom of movement while maintaining the same reliable pumping experience you expect. Simple to set up and use, this accessory extends the functionality of your pump beyond wall-powered operation.