Abstract: Disclosed is an electric storage battery and method of making it, comprising a jellyroll electrode assembly in which electrodes are wound around a pin, and having one or more spacers at or near the inner ends of the electrodes to aid in winding the jellyroll. Also disclosed is an electric storage battery, and method of making it, comprising a jellyroll electrode assembly in which electrodes are wound around a pin, and having a plastic slotted tube closely fitted around the pin and covering the junction of the pin to an electrode substrate or interface material coupled to the electrode substrate. The spacers and plastic slotted tube may be used separately or together.