If you are trying to decide between the Spectra S1 and the Spectra S2, you are in good company. These two pumps are among the most popular insurance-covered options available, and for good reason. They are both hospital-grade, closed-system, double electric pumps that deliver powerful and reliable performance. The difference between them comes down to one key feature, and understanding it will make your decision a lot easier.
What the Spectra S1 and S2 Have in Common
Before getting into the differences, it helps to know how much these two pumps share. Both the S1 and the S2 are hospital-grade pumps, meaning they are built for frequent, long-term use with the same level of suction power and hygiene standards used in clinical settings. Both feature a closed system with a built-in backflow protector, which prevents milk from ever reaching the motor and keeps every session hygienic. Both pumps offer two pumping modes (massage and expression), 12 adjustable suction levels, a built-in night light, a session timer, and compatibility with a wide range of flange sizes and accessories. If performance and milk output are your top priorities, either pump will serve you well.
The One Difference That Actually Matters
The single most important distinction between these two pumps is the battery. The Spectra S1 has a built-in rechargeable battery that lasts up to three hours on a single charge, which means you can pump anywhere without needing access to an outlet. The Spectra S2 does not have a battery and must be plugged in at all times during use.
For moms who plan to pump primarily at home in one spot, the S2 delivers the same performance at a lower price point and is fully covered by most insurance plans. For moms who work outside the home, pump in multiple rooms, travel, or simply want more flexibility, the S1's battery makes a meaningful difference in daily life. The S1 is available through many insurance plans as well, and for plans that cover only the S2 as the base option, an upgrade to the S1 is often available for a small out-of-pocket fee. You can browse Spectra pumps available through Storkpump to see what your plan may cover.
One minor difference worth noting: the S1 is blue and the S2 is pink. Both weigh under three pounds, with the S2 coming in slightly lighter at 2.5 pounds versus the S1's 3 pounds due to the battery.
Which Pump Is Right for You
Think about where and how often you plan to pump. If you are returning to work, commuting, or expect to pump away from a dedicated outlet, the S1's portability will make your routine significantly easier. If you plan to pump mainly at home and prefer to put savings toward other baby essentials, the S2 gives you identical pumping performance without the added cost.
Either way, both pumps are trusted by moms nationwide and are available through Storkpump with insurance coverage. If you are unsure which model your plan covers or whether an upgrade is available, the Storkpump team can walk you through your options. Visit our FAQ page for common insurance questions, or head to our full pump collection to get started.
One more tip before you pump: make sure your flange size is correct regardless of which model you choose. A poor flange fit is one of the most common causes of discomfort and reduced output. Our Flange Sizing Guide can help you find the right measurement before your first session.
Frequently Asked Questions About the Spectra S1 and S2
Is the Spectra S1 or S2 covered by insurance?
Both pumps are covered by many insurance plans, though coverage varies depending on your specific plan. The S2 is covered as the base option by most plans, while the S1 may require a small upgrade fee. Storkpump works directly with your insurance to confirm what is covered so you do not have to figure it out on your own.
Can I use the Spectra S2 without being plugged in?
No. The S2 must be plugged into an outlet during every pumping session. If portability is important to you, the S1 is the better choice because of its built-in rechargeable battery.
Are the pump settings the same on both models?
Yes. Both the S1 and S2 offer the same two pumping modes, 12 suction levels, and six cycle speeds. There is no difference in customization or performance between the two models.
Can both pumps handle exclusive pumping?
Yes. Both the S1 and S2 are built for frequent, multiple-session-per-day use. Their hospital-grade motors are designed to hold up well over months of regular pumping without losing suction strength or efficiency.
What flange sizes are compatible with Spectra pumps?
Spectra pumps are compatible with multiple flange sizes and a variety of third-party accessories. Getting the right flange fit is important for both comfort and milk output. Our Flange Sizing Guide can help you measure correctly before you start pumping.
Ready to Order Your Spectra Pump?
Whether the S1 or S2 is the right fit for your routine, Storkpump makes it easy to get your pump covered through insurance with minimal paperwork and fast shipping. Browse our Spectra pump options, check out our Learning Center for more pumping guidance, or visit our About Us page to learn more about how Storkpump supports families throughout their breastfeeding journey.
Sources:
Academy of Breastfeeding Medicine. (2017). ABM Clinical Protocol #8: Human milk storage information for home use for full-term infants, revised 2017. Breastfeeding Medicine, 12(7). https://doi.org/10.1089/bfm.2017.29047.aje
U.S. Department of Health and Human Services, Office on Women's Health. Breast pumps. https://www.womenshealth.gov/breastfeeding/pumping-and-milk-storage
U.S. Food and Drug Administration. Breast pumps. https://www.fda.gov/medical-devices/consumer-products/breast-pumps
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