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The device works only with a Long electric cable. The rechargeable battery is only used to hang on the window.

The Ecovacs is simply unusable. Not only does it not clean the glass, but - when trying to clean clean panes - it even smears them. These smears, caused by the cleaning solution supplied, are difficult to remove by hand. In addition, it can often happen that it "hangs up" on a corner of the window and has to be repositioned by hand. UNUSABLE. This negative decision has nothing to do with Galaxus. Galaxus was very cooperative and took the unit back without further ado. Peter Bianchi