A mains electricity (AC-powered) instrument, which may include internal rechargeable batteries, intended to be used exclusively at the point-of-care by medical professionals for the qualitative and/or quantitative in vitro determination of one or multiple coagulation components involved in haemostasis in a clinical specimen [e.g., performs tests such as whole blood prothrombin time (WBPT), whole blood partial thromboplastin time (WBPTT), heparin dose response, activated clotting time (ACT)]. It may include spectrophotometry, turbidimetry, nephelometry, electrometry and/or mechanical means of clot formation or end point detection.