S1 Double Electric, Portable Breast Pump

The S1 Plus is a closed-system double electric pump built around a rechargeable battery and a wide range of suction and cycle settings, and it has a strong reputation among parents who pump frequently or exclusively, partly because of that adjustability and partly because closed systems keep milk from ever reaching the motor, which matters for hygiene over months of daily use.

Against the Elvie in this category, the S1 Plus is not wearable or hands-free — it's a traditional plug-in-style pump (albeit with a battery) that sits on a surface with tubes running to the flanges, which means less freedom of movement during a session. What it offers in return is typically stronger, more consistent suction and a lower price than the Elvie, which matters a great deal if you're pumping several times a day rather than occasionally.

For parents whose priority is expressing efficiency and reliability over portability and discretion — particularly anyone exclusively pumping rather than mostly breastfeeding directly — the Spectra's traditional design and strong suction make it a genuinely popular first choice among UK lactation consultants.