Baby Rocker Gen2 (Beige top cover)
It will rock for 60 minutes on continous rocking before turning itself off. You can increase this to 3 hours by using the scrolling wheel in the Sleepytroll app.
A new Gen2 Baby Rocker has a 10-12 hour battery life. This does not mean it will rock continoulsy for 10-12 hours.
Baby Rocker Gen1 (Light blue top cover)
It will rock for up to 40 minutes on continuous rocking before turning itself off. Note that battery effectiveness can be affected by cold temperatures.
A new Sleepytroll Baby Rocker has a 8 hour battery life. This does not mean it will rock continously for 8 hours.