XLife battery is an improved model of iRobot previous battery. It is visually recognizable by its blue cover.
According to iRobot, this battery is able to double the number of life cycles.
This battery does not improve your SCOOBA 400 work-time. Roomba will clean for a similar time than before and will not improve its performance.
All iRobot Roomba models of the 600, 700 and 800 series.
For example 600, 610, 625, 700, 760, 780, 880, 870. All models 500, 600, 700 and 800 series.
The warranty period of this battery is 6 months (Current EU regulation about warraties).