Kärcher OC 4 portable washer: the bike-cleaning solution for flat dwellers

The Kärcher OC 4 is a battery-powered portable washer designed for cleaning bikes and outdoor gear without access to a tap — making it a practical option for apartment dwellers. It runs on its own water tank and rechargeable battery, usable in a basement or courtyard. Testing confirms it is an effective solution for cyclists who lack a garden hose connection.