Replaces: A544, 4LR44, 3131, PX28, 28A, PX28A, 476A, K28, V28, 4G13. Energizer A544 / 4LR44 6V alkaline battery. A544 / 4LR44 6V Alkaline 12mm 26mm. We aim to answer all enquiries within a maximum of 24 hours and can often send replies within minutes.