Spectra S1 PlusvsSpectra S2 Plus

If you need a portable pump with rechargeable battery for on-the-go use, choose Spectra S1; if you primarily pump at home and prefer a corded pump with similar performance, choose Spectra S2.

The key differences: Power Source — Spectra S1 Plus: Rechargeable battery + corded electric, Spectra S2 Plus: Corded electric only (no battery) (S1 has built-in rechargeable battery for portability; S2 must be plugged in.); Included Accessories — Spectra S1 Plus: Bottle, breast flange, valve, Spectra S2 Plus: Breast flange, silicone tube, valve, membrane, bottle, lid, adapter (S2 includes more parts (membrane, tube, adapter).); Rating & Reviews — Spectra S1 Plus: 4.6/5 (6,897 reviews), Spectra S2 Plus: 4.5/5 (5,549 reviews) (S1 has slightly higher rating and more reviews.); Best Sellers Rank (Electric Breast Pumps) — Spectra S1 Plus: #13, Spectra S2 Plus: #39 (S1 is more popular in its category.).

Across the specs we compared, Spectra S1 Plus comes out ahead on 3 and Spectra S2 Plus on 3. The better value depends on which of those wins matter most for how you'll use it — check live pricing on Amazon and weigh it against the pros and cons above.

Reviewers most often highlight: "Rechargeable battery offers great portability." The most common complaint: "Battery life could be longer for heavy use." Weigh that against the Spectra S2 Plus using the full pros and cons above to decide.

Reviewers most often highlight: "Reliable and consistent suction." The most common complaint: "Must be plugged into an outlet." Weigh that against the Spectra S1 Plus using the full pros and cons above to decide.

It's based on AI analysis of 12,446 Amazon customer reviews (6,897 for Spectra S1 Plus, 5,549 for Spectra S2 Plus) alongside the full specifications of both products.