Spectra S1 vs S2 Breast Pump: Feature Comparison and Review

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A Spectra breast pump is high on the shopping list for many new moms. They are one of the most popular and trusted breast pump brands, and this leaves the final decision of which model to choose?

The S1 and S2 breast pumps are actually very similar. With performance and function almost identical.

However, there is one feature that differentiates the price, weight, and range of uses by enough to completely change whether you would suit an S1 vs an S2.

In this article, we will compare all features and take an in-depth look at both pumps. This will help you determine which one is right for you and how much you want to spend.

Spectra S1 vs S2: Quick Summary

You can sum up the difference between the spectra s1 and s2 breast pump with the following points:

Buy the Spectra S1 – if you need to be able to pump anywhere, any time, are not worried about budget (and have slightly stronger arms – a built in rechargeable battery is heavy!).

Buy the Spectra S2 – if you plan on pumping at home or always near an electrical outlet, and want to save some money (and slightly weaker arms).

Spectra - S1 Plus Electric Breast Milk Pump for Baby Feeding - Convenient Breast Feeding Support
Spectra - S2 Plus Electric Breast Milk Pump for Baby Feeding - Convenient Breast Feeding Support
Spectra Breast Pump
S2 Plus
Hospital Grade
Customize Setting
Closed System
Rechargeable Battery
Weight (parent unit)
2.4 lbs
2.0 lbs
Spectra - S1 Plus Electric Breast Milk Pump for Baby Feeding - Convenient Breast Feeding Support
Spectra Breast Pump
Hospital Grade
Customize Setting
Closed System
Rechargeable Battery
Weight (parent unit)
2.4 lbs
Spectra - S2 Plus Electric Breast Milk Pump for Baby Feeding - Convenient Breast Feeding Support
Spectra Breast Pump
S2 Plus
Hospital Grade
Customize Setting
Closed System
Rechargeable Battery
Weight (parent unit)
2.0 lbs

Spectra S1 And S2 Performance Comparison

This section will detail the main differences between these two pumps and rate them on their comparable performance.

There are not many, but each one is critical to ensure that you get the best use out of your pump.

Spectra S1 vs S2 Performance Comparison

Battery Powered

The S1 will get you around three hours of battery life via the built-in rechargeable battery.

It can take up to four hours to fully charge but will provide a hospital-grade pumping experience while being fully mobile.

The S2 has no battery and will require access to a power outlet at all times.

Verdict S1


The battery does make the S1 weigh more than the S2.

  • S1 – 2.4 lbs
  • S2 – 2.0 lbs

For working moms who have to carry a breast pump to work, and will always have a power source in the office, the S2 might be the better choice due to the lighter weight.

The difference is not huge but when you also consider you will be carrying your pumped milk home at the end of the day that extra weight can add up.

Verdict S2


The absence of the battery also makes the S2 cheaper. The price difference is usually around $50 depending on when you buy it.

This offers great value for money with the S2 outperforming most other breast pumps on the market for a cheaper price.

If you need the S1 then this is still an attractive price point relative to some alternatives.

Verdict S2


The final difference is the color of the motor unit.

There is no option to customize this and your pump will be as per the following:

  • S1 – Blue
  • S2 – Pink
Spectra S1 and Spectra S2 Colors

Common Features & Functionality

In this section, we will summarise the industry-leading features and functionality offered by both of these pumps.

Aside from the details already discussed, they are basically the same pump and will provide years of reliable use.

Closed System

Closed system pumps are made with special backflow protection to prevent breast milk from entering the tubing and motor.

It prevents extra moisture from ending up where it’s not supposed to. This can damage the motor and lead to bacteria growth which may end up in your pumped milk.

A closed system is also easier to clean and a big time-saver for working moms who have to squeeze multiple pumping sessions into their day.

Both the S1 and S2 pumps are designed as a closed system.

Double Electric Breast Pump

You have the option to double pump for the most efficient session or use it as a single pump if needed.

This comes in handy if you need to quickly express from one breast if feeding your baby directly has left you unbalanced.

Customizable Settings

Both models offer full control of the following three elements of your pumping session:

  • Suction power – 12 levels with a maximum strength of 270mmHg.
  • Cycle Speed – Some other pumps from Spectra only have auto cycle speed so this is a big plus.
  • Pumping mode – see below for a more detailed summary of this functionality.

Both Spectra pumps will cycle through multiple pumping modes to simulate the natural progression of a feeding session:

  • Massage mode – to trigger your body’s let-down reflex.
  • Expression mode – to simulate the sucking motion of your baby feeding.

When you establish a flow that works for you there is a memory function to record your pump settings.

This will record the speed, power, and progression of the suction so you can just press a button and have the same experience time and time again.

This feature is a huge time saver!

Hospital Grade Pump

hospital-grade breast pump is defined by the following parameters:

  • Capable of initiating and supporting milk supply.
  • Able to be used by multiple users safely and hygienically.
  • Durable enough to be used by a mum expressing often (i.e. 8 x a day) and has a long motor life.

However, this is not something recognized by the FDA and are standards set directly by Spectra.

Both of these breast pumps are hospital grade and satisfy each of the three points above.

Extra Built-In Features

The parent units have a handful of additional features that will make your experience smoother:

  • Built-in auto timer – This will help you keep track of your sessions without needing to remember to set one or looking at the clock to track your time.
  • Quiet motor – At 45db you will hear a gentle humming sound that shouldn’t disturb a sleeping baby.
  • Adjustable night light – This has two light modes so you can opt for a dimmer setting for those nighttime pumping sessions.
  • LCD Display – This also lights up at night time making it easy to read in the dark.


A complete accessory kit is included allowing you to start pumping immediately.

Here is a full list of inclusions for both packages:

  • 2x 24mm Breast flanges
  • 2x 28mm Breast Flanges
  • 2x Spectra tubing
  • 2x Duckbill valves
  • 2x Backflow protectors
  • 2x Wide Neck Bottles
  • 1x Power cord and adapter (S2 12v; S9 9v)

Note: You can also buy extra flanges, extra bottles, and other additional accessories from the Spectra store page. The flanges come in 20mm, 24mm, 28mm, and 32mm sizes. You just have to factor in the cost.

BPA Free

All Spectra parts are manufactured without the use of BPA chemicals.

This is commonly used to harden plastics and can be harmful to children. So best to keep away from anything that will be used to feed your baby!

Spectra S1 vs S2 Buying Decision Guide

Your Buying Decision

With all of the similarities between these pumps, there is really only one feature per pump that distinguishes one from the other.

  • For the S1 – Includes the rechargeable battery.
  • For the S2 – You can buy it at a cheaper price.

This section will help you ask yourself the right questions if you are still not sure which one suits you best.

Why Choose The S1?


This portable pump is great for working moms who are constantly on the move and have less predictability around where they will be for their next pumping session.

Or moms who like being outdoors and want the freedom of being able to pump at the local park, or beach.

You will need to spend a little more but will be rewarded with the freedom of mobility without sacrificing anything in terms of performance.

Read the full S1 breast pump review here.

Why Choose The S2?


The S2 is a cheaper option which may be a necessity for moms on a tighter budget.

It is also the most suitable for moms with a predictable routine. If you know you are going to be pumping at home, or in the office – both with facilities at your disposal – then the S1 is an unnecessary expense.

The S2 offers excellent value for money!

Read the full S2 breast pump review here.

Why Choose A Spectra Breast Pump

Spectra has some of the best double electric breast pumps on the market, mostly due to the fact that their products focus on Natural Nursing Technology for women.

These features help make double pumping breast milk more comfortable and feel more natural. This is where Spectra breast pumps excel.

With customizable settings, you can work through all the phases of breastfeeding, from suckling milk and pre-letdown with massage mode, all the way through post-letdown.

You also have full control over the speed and suction strength, so you can always find a setting that is most comfortable for you, and ultimately help you produce more milk.


Which is better – Spectra S1 or S2?

When choosing between the S1 and S2 model you need to weigh up the importance of portability and cost.

If you can afford it, and you need to pump in various locations then the S1 is the right breast pump for you.

However, if your budget is lower and you will be pumping mostly at home then the S2 model will do an excellent job. You can supplement your pumping with a cheap manual breast pump if the need arises.

Is the Spectra S1 and Spectra S2 Breast Pump Hospital Grade?

Yes, both the Spectra S1 and the S2 are hospital grade electric breast pumps as defined by the following parameters:

  • Capable of initiating and supporting milk supply.
  • Able to be used by multiple users safely and hygienically.
  • Durable enough to be used by a mum expressing often (i.e. 8 x a day) and has a long motor life.
Spectra S1 vs S2 Breast Pumps

Are the Spectra S1 and S2 better than the Medela Range?

The Spectra and the Medela are both top of the range breast pumps, and whether one is better depends on your intended use.

A key point of difference is that the Medela Pump in Style comes with a breast pump bag and cooler, which really pushes that portability angle… But it’s heavier!

You can check out a full comparison of the Medela Pump in Style vs Spectra S2 here.

Will my Insurance Cover a Spectra Breast Pump?

If you are buying your breast pump through your insurance company then make sure you check your level of coverage first, and if you are able to choose the model you want.

Some insurance companies may only allow you to purchase the cheaper S2 Spectra pump.

If you want the S1 and are not fully covered, then you may have the option to pay the excess cost for the more expensive model above the insurance claim.

Can I Buy Spare Pump Parts Separately?

Yes, one of the best things about a Spectra pump is that you can buy replacement parts easily and maintenance is simple. This ensures that you can use your new pump for years to come!

You have the option to buy a complete accessory pack (flange, backflow protector, duckbill valve, tube) or individual parts depending on what you need.

A referenced earlier, the Spectra store page will have all of the available options for you to browse.

Final Word

These Spectra breast pumps are amongst the best available on the market and are suitable for the heavy-duty use associated with exclusive pumping.

Both are quiet, efficient, and overall very comfortable through the use of massage and expression mode.

A lot of thought has gone into the design of these pumps. All of the included features such as the built-in night light, memory settings, and timer with automatic shut-off really smooth out your pumping experience and make it as easy on mom as possible.

Before you buy, the two critical questions of whether you need a built-in battery or not, or if you need the cheaper option of the S2. This will ensure you get what suits you best!

I hope you have enjoyed our development detailed performance summary of the Spectra S1 vs s2 pumps. Which will you choose?

Read more:

Spectra S1 vs S1 reviews

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Hi, my name is Schianne, wife to my high school sweetheart and mother to a beautiful and clever little girl. I've always had a passion for all thing writing and literature, and motherhood has really allowed me to bring that passion to life. Experiencing how wonderfully challenging pregnancy and motherhood can be has made me want to share my story and tips with other mothers to help them realize two very important things: you are not alone and you are stronger than you think!

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