The convenient digital display on the battery shows the remaining usage time in real-time, regardless of the device. Lithium-ion battery technology ensures consistent performance regardless of charge level and maintains the charge even during storage. The battery has a soft coating, so you can place it on an unstable surface for a moment. The 18 V / 2.4 Ah Battery Power replacement battery is compatible with all Kärcher 18 V Battery Power battery-operated devices.