Understanding Spectra S1 vs S2: The Complete Guide
When it comes to choosing a breast pump, Spectra has become one of the most trusted names in the industry. Their hospital-grade pumps deliver exceptional performance at consumer-friendly prices, making them favorites among lactation consultants and mothers alike. But with two flagship models—the S1 Plus and S2 Plus—many mothers struggle to decide which one is right for them.
The Spectra S1 and S2 are remarkably similar pumps, sharing the same powerful motor, gentle suction technology, and closed-system design that prevents milk backflow. In fact, about 95% of their features are identical. The primary difference comes down to one crucial factor: portability. The S1 Plus includes a built-in rechargeable battery, while the S2 Plus must be plugged into a wall outlet.
This seemingly simple difference has significant implications for your pumping routine, lifestyle, and budget. In this comprehensive comparison, I'll break down every aspect of both models to help you make an informed decision. As an IBCLC who has worked with thousands of pumping mothers, I've seen firsthand how the right pump choice can make your breastfeeding journey significantly easier.
Whether you're a working mom who needs flexibility, a stay-at-home parent establishing a pumping routine, or an exclusively pumping mother, understanding the differences between the S1 and S2 will help you choose the model that best fits your needs and lifestyle. Let's dive into the details.
Quick Verdict: Which Should You Choose?
Choose the S1 Plus If:
- ✓ You need to pump in multiple locations
- ✓ You're a working mom without guaranteed outlet access
- ✓ You travel frequently
- ✓ You want maximum flexibility and convenience
- ✓ You can afford the $30 premium
Choose the S2 Plus If:
- ✓ You primarily pump at home
- ✓ You have a dedicated pumping space with an outlet
- ✓ You want to save $30
- ✓ You prefer not to worry about charging batteries
- ✓ You want the best value for hospital-grade performance
Expert Recommendation
For most mothers, the Spectra S2 Plus offers the best value. It delivers identical pumping performance to the S1 at a lower price point. However, if your lifestyle requires pumping in various locations or you value the convenience of battery operation, the S1's $30 premium is absolutely worth it.
Remember: Both pumps are covered by most insurance plans, so check your benefits. If insurance covers both models equally, choose the S1 Plus for the added flexibility at no extra cost to you.
Detailed Comparison Table: S1 Plus vs S2 Plus
| Feature | Spectra S1 Plus | Spectra S2 Plus |
|---|---|---|
| Price (MSRP) | $189.99 | $159.99 |
| Power Source | Rechargeable Battery + AC Adapter | AC Adapter Only (Plug-in) |
| Battery Life | 2-3 hours (3-6 sessions) | N/A - Must be plugged in |
| Weight | 3.35 lbs (1.52 kg) | 3.09 lbs (1.40 kg) |
| Portability | Limited (Requires Outlet) | |
| Suction Levels | 12 Levels | 12 Levels |
| Cycle Speeds | 5 Speeds | 5 Speeds |
| Maximum Suction | 270 mmHg | 270 mmHg |
| Closed System | ||
| Nightlight | ||
| Noise Level | ~45 dB (Quiet) | ~45 dB (Quiet) |
| LCD Display | ||
| Timer Function | ||
| Let-down Mode | ||
| Expression Mode | ||
| Hospital Grade | ||
| Warranty | 1 Year | 1 Year |
| Insurance Coverage | ||
| Includes Tote Bag | ||
| Best For | Working moms, travel, flexibility | Home use, value seekers |
Key Differences Explained: What Really Matters
While the comparison table above shows many similarities, let's dive deeper into the differences that actually impact your daily pumping experience. Understanding these distinctions will help you determine which model aligns better with your lifestyle and needs.
1. Battery vs. Plug-in: The Primary Distinction
The rechargeable battery in the S1 Plus is the defining feature that sets it apart from the S2. This isn't just about convenience—it fundamentally changes how and where you can use the pump. The S1's lithium-ion battery provides approximately 2-3 hours of continuous pumping time, which translates to 3-6 typical pumping sessions before needing a recharge.
This battery freedom means you can pump in a car during your commute, in a conference room without worrying about outlet placement, at a park while supervising older children, or anywhere else life takes you. For mothers who pump multiple times throughout the day in different locations, this flexibility is invaluable.
The S2 Plus, being plug-in only, requires you to be within reach of a power outlet. While this might seem limiting, it actually offers some advantages. You never have to worry about forgetting to charge your pump, and the consistent power supply means there's no potential for reduced suction as a battery drains. For mothers who primarily pump at home or in a dedicated pumping space at work, the plug-in design works perfectly well.
2. Weight Difference: Minimal But Worth Noting
The S1 Plus weighs 3.35 pounds compared to the S2's 3.09 pounds—a difference of just 0.26 pounds or about 4 ounces. While this is roughly equivalent to the weight of a smartphone, the difference becomes more noticeable when you're carrying the pump in a bag along with other pumping supplies, work materials, and personal items.
However, the S1 Plus comes with a convenient tote bag designed specifically to accommodate the pump and all its accessories. This included bag is sturdy, well-organized, and makes transporting the pump easier despite the slight weight increase. The S2 Plus doesn't include a tote bag, though many mothers purchase one separately or use their own bag.
3. Price Premium: Is $30 Worth It?
The S1 Plus typically retails for $189.99 compared to the S2's $159.99—a $30 difference. When you consider that this $30 buys you rechargeable battery technology, enhanced portability, and an included tote bag, it's actually quite reasonable. To put it in perspective, this price difference is less than the cost of many pump accessories or a single nursing bra.
However, the value equation changes if you're purchasing through insurance. Many insurance plans cover both models equally under the Affordable Care Act's breast pump benefit. In these cases, you may get the S1 Plus at no additional cost, making it the obvious choice. Always check with your insurance provider or a service like Aeroflow Breastpumps to understand your specific coverage before making a decision.
4. Identical Performance Features
It's crucial to understand that despite the price and portability differences, both pumps offer identical pumping performance. They use the same powerful motor, the same 12 suction levels, the same 5 cycle speeds, and the same maximum suction strength of 270 mmHg. Both feature Spectra's signature closed system design that prevents milk from entering the tubing and motor, making them hygienic and safe.
Both models include the gentle let-down mode that mimics a baby's initial rapid sucking to trigger milk release, followed by the expression mode with slower, deeper suction to efficiently extract milk. Both have the convenient nightlight feature, LCD display, and timer function. When it comes to actual milk removal efficiency and comfort, you won't notice any difference between the two models.
This performance parity means your decision can focus entirely on lifestyle factors rather than worrying about whether one pump will work better than the other. Both are hospital-grade pumps that deliver excellent results for most mothers.
Portability & Battery Life: Freedom vs. Consistency
For many mothers, portability is the deciding factor when choosing between the S1 and S2. Let's explore what portability really means in practical, everyday terms and whether battery operation is worth the investment for your situation.
Understanding the S1's Battery Performance
The Spectra S1 Plus uses a rechargeable lithium-ion battery that provides approximately 2-3 hours of continuous operation when fully charged. In real-world use, this typically translates to 3-6 pumping sessions, depending on how long each session lasts. Most mothers pump for 15-20 minutes per session, which means you can comfortably get through a full workday on a single charge.
Charging the battery takes approximately 3 hours from empty to full using the included AC adapter. Many mothers charge their pump overnight or between uses, ensuring it's always ready when needed. The pump can also be used while plugged in and charging, which means you get the best of both worlds—the option to use it portably or as a plug-in pump when convenient.
One important consideration: like all rechargeable batteries, the S1's battery capacity will gradually decrease over time. After 2-3 years of regular use, you may notice shorter battery life between charges. However, since the pump can still be used while plugged in, this degradation doesn't make the pump unusable—it just gradually becomes more like the S2 in terms of needing to stay connected to power.
Real-World Portability Scenarios
Who truly benefits from the S1's portability? Based on my experience working with hundreds of pumping mothers, the battery feature is most valuable for working mothers who pump in multiple locations throughout their day. If your office doesn't have a dedicated lactation room or if outlets are inconveniently located, the S1 eliminates the frustration of dealing with power cords and outlet hunting.
Mothers who commute long distances also love the S1. Being able to pump hands-free in the car during your commute (with a hands-free bra) can save significant time and reduce stress. Similarly, mothers who travel frequently for work appreciate being able to pump in airport lounges, hotel rooms, or during road trips without worrying about outlet access.
The portability also proves valuable for stay-at-home mothers who want flexibility around the house. You can pump in the nursery while soothing the baby, in the living room while supervising toddlers, or even outside in your yard on a nice day. This freedom of movement, while not essential, can make pumping feel less isolating and restrictive.
When Plug-in Design Works Just Fine
Conversely, many mothers find the S2's plug-in design perfectly adequate for their needs. If you have a dedicated pumping space at home or work with conveniently located outlets, being tethered to a wall isn't really a limitation. In fact, some mothers prefer not having to remember to charge a battery—you simply plug in and pump, with no planning required.
The plug-in design also ensures consistent power throughout your pumping session. There's never a concern about the battery dying mid-session or wondering if you have enough charge left for your next pumping time. For mothers who value simplicity and predictability, the S2's straightforward plug-in operation can actually be preferable.
Performance & Suction: Identical Hospital-Grade Quality
When it comes to the actual job of removing milk efficiently and comfortably, the Spectra S1 and S2 are identical twins. Both pumps feature the same powerful motor technology and advanced suction system that has made Spectra a favorite among lactation professionals and mothers worldwide.
Suction Strength and Customization
Both models offer 12 distinct suction levels ranging from very gentle to maximum strength, with a maximum suction of 270 mmHg. This extensive range allows you to find the perfect suction strength for your comfort and efficiency. Most mothers find their ideal setting between levels 6-9, though individual preferences vary significantly based on nipple sensitivity and milk flow patterns.
The 5 cycle speed options control how quickly the pump cycles through suction and release. Faster cycles (in let-down mode) mimic a baby's rapid initial suckling to stimulate milk release, while slower cycles (in expression mode) replicate the deeper, more rhythmic sucking pattern that efficiently drains the breast. This two-phase expression technology is scientifically proven to improve milk output compared to single-phase pumps.
In clinical testing and real-world use, both the S1 and S2 demonstrate excellent milk removal efficiency. Most mothers can fully empty their breasts in 15-20 minutes with either pump, which is comparable to high-end hospital-grade rental pumps costing significantly more.
Closed System Design: A Critical Safety Feature
Both Spectra models feature a closed system design, which means there's a physical barrier preventing milk from flowing back into the tubing and motor. This design is crucial for hygiene and safety, as it prevents milk particles from entering areas that can't be cleaned, where bacteria and mold could grow.
The closed system also protects the motor from milk damage, extending the pump's lifespan. With open-system pumps, milk backflow can damage the motor and create cleaning challenges. Spectra's closed system eliminates these concerns, making both the S1 and S2 suitable for long-term use and even allowing safe pump sharing between mothers (with separate collection kits).
Comfort Features for Extended Pumping
Spectra pumps are renowned for their gentle, comfortable suction that reduces nipple trauma and pain. Both the S1 and S2 use massage cushion technology in the breast shields to stimulate milk flow while remaining comfortable even during extended pumping sessions. The soft silicone massage cushions gently compress the breast without the harsh, painful pulling sensation some pumps create.
The quiet operation of both models (approximately 45 decibels) also contributes to a more pleasant pumping experience. You can pump discreetly at work, pump while the baby sleeps nearby, or pump during phone calls without the motor noise being disruptive or embarrassing. This quiet performance is maintained consistently with both the S1 (on battery or plugged in) and the S2.
Value & Price Comparison: Getting the Most for Your Money
Understanding the value proposition of each pump requires looking beyond the sticker price to consider long-term costs, insurance coverage, and the actual return on investment based on your specific needs.
Breaking Down the Price Difference
At retail prices, the S1 Plus costs $189.99 while the S2 Plus costs $159.99—a $30 difference. When you break down what that $30 buys you, it includes the rechargeable battery technology, increased portability, and an included tote bag. If you were to purchase these features separately (hypothetically), a quality rechargeable battery pack would cost $40-60, and a proper pump tote bag costs $20-30. From this perspective, the $30 premium is actually quite reasonable.
However, for budget-conscious mothers or those who primarily pump at home, saving $30 is meaningful. That money can go toward other pumping essentials like extra breast shields, storage bags, a hands-free pumping bra, or a lactation consultant visit. The S2 delivers identical pumping performance, so you're not sacrificing quality to save money.
Insurance Coverage Considerations
The Affordable Care Act requires most insurance plans to cover breast pumps at no cost to the mother. Many plans cover both the S1 and S2 equally, meaning you can get either pump for free or for the same copay. In this scenario, the S1 is the obvious choice since you get the added portability features at no additional cost.
However, some insurance plans tier their coverage, offering basic pumps (like the S2) at no cost but requiring a copay or upgrade fee for premium pumps (like the S1). If your plan requires a $30-50 upgrade fee for the S1, you'll need to evaluate whether the portability features are worth that cost to you personally.
I always recommend checking your specific insurance coverage before making a purchase decision. Services like Aeroflow Breastpumps can help you navigate insurance coverage and often process claims directly, making it easier to understand your options and costs.
Long-Term Value and Durability
Both Spectra pumps are built to last. With proper care and cleaning, either model should serve you well throughout your entire breastfeeding journey, whether that's 3 months or 3 years. Both come with a 1-year manufacturer's warranty and have excellent customer service support.
The S1's battery will gradually lose capacity over time, typically after 2-3 years of regular use. However, since the pump functions perfectly well when plugged in, this battery degradation doesn't require replacing the entire pump—it simply means you'll need to use it plugged in more often as it ages. Replacement batteries are available from third-party sellers, though they're not officially supported by Spectra.
Both pumps use the same replacement parts (breast shields, valves, tubing, bottles), which are widely available and affordable. This parts compatibility means your long-term maintenance costs are identical regardless of which model you choose.
Pros & Cons: Side-by-Side Comparison
Spectra S1 Plus Pros
- Rechargeable battery provides 2-3 hours of cordless operation
- Pump anywhere without needing an outlet
- Ideal for working moms, travel, and on-the-go pumping
- Can be used while plugged in and charging
- Includes convenient tote bag for transport
- Hospital-grade performance and closed system design
- Quiet operation at ~45 dB
- 12 suction levels and 5 cycle speeds
- Built-in nightlight and LCD timer
- Covered by most insurance plans
Spectra S1 Plus Cons
- $30 more expensive than S2 Plus
- Slightly heavier (3.35 lbs vs 3.09 lbs)
- Battery must be charged regularly
- Battery capacity decreases over time (2-3 years)
- More components that could potentially fail
Spectra S2 Plus Pros
- $30 less expensive than S1 Plus
- Excellent value for hospital-grade performance
- Slightly lighter weight (3.09 lbs)
- No battery to charge or maintain
- Consistent power throughout pumping session
- Hospital-grade performance and closed system design
- Quiet operation at ~45 dB
- 12 suction levels and 5 cycle speeds
- Built-in nightlight and LCD timer
- Covered by most insurance plans
Spectra S2 Plus Cons
- Must be plugged into outlet to operate
- Limited portability compared to S1
- Power cord can be inconvenient in some locations
- No included tote bag for transport
- Not ideal for pumping in car or without outlet access
Who Should Buy Each Model?
Buy the Spectra S1 Plus If You Are:
- Working Moms: Especially those who pump in multiple locations or don't have guaranteed outlet access in pumping spaces
- Frequent Travelers: Business travelers or families who travel regularly and need pumping flexibility
- Commuters: Mothers with long commutes who want to pump in the car to save time
- Active Moms: Those who want to pump while supervising older children or moving around the house
- Flexibility Seekers: Anyone who values the freedom to pump anywhere without planning around outlets
- Insurance Covered: If your insurance covers both models equally, the S1 is the obvious choice
Buy the Spectra S2 Plus If You Are:
- Stay-at-Home Moms: Who primarily pump in one dedicated location at home
- Budget-Conscious: Want to save $30 without sacrificing pumping performance
- Office Pumpers: With a dedicated lactation room that has convenient outlet access
- Simplicity Seekers: Prefer not to worry about charging batteries or managing battery life
- Exclusively Pumping: Mothers who pump 8+ times daily at home with a established routine
- Value Seekers: Want hospital-grade performance at the lowest possible price
Still Undecided?
If you're truly torn between the two models, ask yourself this question: "In a typical week, how many times will I pump somewhere without easy outlet access?"
- 3+ times per week: The S1 will significantly improve your quality of life and is worth the investment
- 1-2 times per week: The S1 is nice to have but not essential; depends on your budget
- Rarely or never: The S2 is the smarter choice and will save you money
Remember: You can't go wrong with either pump. Both are excellent hospital-grade breast pumps that will serve you well throughout your breastfeeding journey.
Where to Buy: Best Deals & Retailers
Both Spectra models are widely available from major retailers and through insurance providers. Here are the best options for purchasing either pump:
Insurance Coverage (Best Value - Often Free)
Under the Affordable Care Act, most insurance plans must provide a breast pump at no cost. Both the S1 and S2 are typically covered, though some plans may require a copay for the S1. Use a DME supplier like Aeroflow Breastpumps to easily process your claim and receive your pump before or after delivery.
Amazon (Best for Out-of-Pocket Purchase)
Amazon consistently offers the lowest prices on Spectra pumps for cash purchases, with fast Prime shipping and hassle-free returns. Current prices typically represent the best available deals:
Target (Convenient In-Store Pickup and Returns)
Target carries Spectra pumps both online and in many physical stores, offering same-day pickup or delivery in most areas. Prices are competitive with Amazon, and Target's RedCard provides an additional 5% discount. The ability to see products in person and easy in-store returns make Target convenient for mothers who prefer shopping locally.
Official Spectra Baby Website
Purchase directly from Spectra Baby USA for guaranteed authentic products and manufacturer support. The official website often runs promotions and bundles that include replacement parts and accessories.
Money-Saving Tips
- Insurance First: Always check insurance coverage before buying out-of-pocket—you may get your pump for free
- Price Match: Many retailers will match competitor prices, so compare before purchasing
- Bundle Deals: Look for bundles that include extra breast shields, storage bags, or cleaning supplies
- Registry Discounts: Add to your baby registry for completion discounts (often 10-15% off)
- Prime Day/Black Friday: Spectra pumps are often discounted during major shopping events
Frequently Asked Questions: Spectra S1 vs S2
What is the main difference between Spectra S1 and S2?
The main difference is portability. The Spectra S1 Plus has a built-in rechargeable battery, allowing you to pump anywhere without needing an outlet. The S2 Plus requires being plugged into a power outlet at all times.
Both models offer identical pumping performance, suction strength (270 mmHg), 12 suction levels, 5 cycle speeds, and features. The only differences are the battery, weight (S1 is 0.26 lbs heavier), price (S1 costs $30 more), and the S1 includes a tote bag.
Is the Spectra S1 worth the extra cost over the S2?
The S1 is worth the extra $30 if you need portability and flexibility. It's ideal for:
- Working moms who pump at the office without guaranteed outlet access
- Mothers who travel frequently
- Anyone who wants to pump in multiple locations (car, park, different rooms)
- Those who value convenience and freedom of movement
If you primarily pump at home in one location with easy outlet access, the S2 offers better value. The pumping performance is identical, so you're only paying for portability features.
Does the Spectra S1 have better suction than the S2?
No, both the S1 Plus and S2 Plus have identical suction strength and performance. They use the same motor technology with:
- Maximum suction of 270 mmHg
- 12 suction levels for customization
- 5 cycle speeds
- Two-phase expression (let-down and expression modes)
The milk removal efficiency, comfort level, and overall pumping performance are exactly the same. The only difference is the S1's rechargeable battery for portability.
How long does the Spectra S1 battery last?
The Spectra S1 Plus battery lasts approximately 2-3 hours of continuous pumping on a full charge. In practical terms:
- 3-6 pumping sessions per charge (based on 15-20 minute sessions)
- Typical workday coverage on a single charge for most mothers
- 3 hours to fully recharge from empty using the AC adapter
The battery is rechargeable lithium-ion and will gradually lose capacity over 2-3 years of regular use, similar to phone batteries. However, the pump can always be used while plugged in, so battery degradation doesn't make it unusable.
Can I use the Spectra S1 while it's plugged in?
Yes, the Spectra S1 Plus can be used while plugged in, and it will charge the battery simultaneously. This gives you the best of both worlds:
- Use it as a plug-in pump at home (like the S2)
- Use it on battery power when you need portability
- Charge while pumping if the battery is low
This flexibility means the S1 essentially functions as both a portable and stationary pump, adapting to your changing needs throughout the day.
Which Spectra model is quieter, S1 or S2?
Both the S1 and S2 operate at the same noise level, approximately 45 decibels. They use identical quiet motor technology that's comparable to:
- Quiet conversation
- Refrigerator humming
- Soft background music
Some users report the S1 may be marginally quieter when running on battery power versus when plugged in, but the difference is minimal and barely noticeable. Both models are quiet enough for pumping at work, while baby sleeps, or during phone calls.
Do both Spectra S1 and S2 have nightlights?
Yes, both the S1 Plus and S2 Plus models feature a soft LED nightlight that's perfect for nighttime pumping sessions. The nightlight:
- Can be turned on or off independently of the pump
- Provides gentle illumination without being too bright
- Helps you see pump controls and bottle levels in the dark
- Won't disturb sleeping babies or partners
This feature makes both models excellent for middle-of-the-night pumping sessions when you don't want to turn on bright overhead lights.
Are Spectra S1 and S2 parts interchangeable?
Yes, the Spectra S1 and S2 use identical breast shields, valves, tubing, backflow protectors, and collection bottles. All replacement parts and accessories are completely interchangeable between both models.
This means:
- You can use the same replacement parts for either pump
- Easy to find compatible accessories from multiple retailers
- Can share parts between pumps if you own both
- Upgrade or downgrade between models without losing your accessory investment
Which model is better for working moms?
The Spectra S1 Plus is generally better for working moms due to its rechargeable battery and portability. It's ideal if you:
- Pump in various office locations
- Don't have a dedicated lactation room with guaranteed outlet access
- Travel for work or have long commutes
- Need flexibility to pump in conference rooms, cars, or other spaces
- Want to avoid hunting for outlets or dealing with extension cords
However, if you have a dedicated pumping space at work with convenient outlets and you'll always pump in that same location, the S2 works equally well and saves you $30. Both pumps are quiet and discreet enough for office use.
Can I buy the Spectra S1 or S2 with insurance?
Yes, both the Spectra S1 Plus and S2 Plus are covered by most insurance plans under the Affordable Care Act's breast pump benefit. Most private insurance plans must provide a breast pump at no cost to you.
To obtain your pump through insurance:
- Contact your insurance provider to verify breast pump coverage
- Ask which Spectra models are covered and if there's a price difference
- Use a service like Aeroflow Breastpumps to process your claim easily
- Order your pump 4-6 weeks before your due date
Important: Some plans cover both S1 and S2 equally (free), while others may cover the S2 fully but require a copay/upgrade fee for the S1. Always check your specific plan details.
Related Resources
Spectra Brand Review
Complete review of all Spectra breast pump models including S1, S2, S9, and Synergy Gold with detailed comparisons and recommendations.
Read Full ReviewBreast Pump Buying Guide
Expert guide to choosing the right breast pump for your needs, lifestyle, and budget with comparison charts and decision tools.
View Buying GuideWorking Moms Guide
Essential tips for pumping at work, maintaining milk supply, storage guidelines, and balancing work with breastfeeding.
Read GuideMedical Disclaimer
The information provided on this website is for educational and informational purposes only and should not be construed as medical advice. Always consult with a qualified healthcare provider, lactation consultant (IBCLC), or your physician before making decisions about breast pump selection, breastfeeding practices, or infant feeding. Individual circumstances vary, and what works for one mother may not work for another. If you experience persistent breastfeeding difficulties, pain during pumping, or concerns about your baby's feeding, please seek professional medical guidance immediately.