Abstract: The application discloses a method of packaging an electrochemical cell wherein a cell precursor is arranged between one or more sheets of sealing material and sealed in the material such that connections (5) for the cell extend beyond the seal (4). The sealing material has slits or apertures (7) which, when the cell precursor is sealed in the material, are arranged to the outer side of the seal (4) at the cell connections and which register with the connections extending beyond the said seal. In the method, at least one cut (AB, CD, EF) is made between the slits or apertures (7) to remove excess sealing material from the cell connections.