If something is bought and sold, which breaks down after much too short a time, it is called scrap. Unfortunately this review is justified in the Sagrotanspendern. We now have "consumed" four of those things. The defect is always the same: It does nothing more. Changing the battery is useless. Sensor is clean. The unit simply does not respond as it should. None of the equipment has more than one battery charge "managed". Only one device has survived more than 3 soap cartridges. After that, it is also broke. Why did not we equal ceased? Because we bought the first unit three more cartridges. After the failure of the first, we bought another with the associated cartridge. Once again this was quickly broken, we had several half-full and three full cartridges. And bought the next ... Now it's over. Soap is transferred into dispenser with manual pump. The Sagrotanpumpen not get us into the house.