The SeQual Eclipse 5 battery was designed with the patient in mind. Not only does it get superb battery life for a continuous flow unit, but it is an all around simple design. Inserting your battery into the external charger or the Eclipse 5 takes little to no effort and clicks into place, letting you know your battery is secure. There is a push tab on the face of the battery which is used to release the battery from your concentrator or external battery charger. With the help of the SeQual Eclipse 5 battery, you will be able to spend more time doing the things you love rather than getting your oxygen situated. Things like playing a full round of golf, taking your grandkids to the ball game, or relaxing by the water are now possible without plugging your concentrator in. Battery life ranges from up to 5.4 hours on pulse setting 1 to 1.8 hours on pulse setting 6, and up to 3.7 hours on continuous setting 1 to 1.3 hours on continuous setting 3.