How long will the battery last on the Medela Pump In Style?

The Pump In Style Battery Pack is intended for use with Pump In Style breast pumps (manufactured in January 2008 and later) ONLY.

The Battery Pack uses 8 AA alkaline batteries, or, for more consistent pump performance, use rechargeable batteries.

Each will provide approximately 2 hours of pumping time. It is recommended that batteries be replaced or recharged between the 10th and 12th pumping session.