Spectra S1 vs S2: Best Breast Pump 2026

The ONLY difference: The S1 has a rechargeable battery. The S2 requires a power cord. Everything else is identical.

The Key Question: Do You Need a Battery?

Choose the Spectra S1 if:

–  You pump at work (away from outlets)

–  You travel frequently

–  You pump in your car (daycare runs, commute)

–  Your home has limited outlets near comfortable seating

–  You want to pump in multiple rooms without moving cords

–  You value true portability

Choose the Spectra S2 if:

–  You primarily pump at home

–  You have power outlets near your pumping spot

–  You want to spend less

–  You don’t mind being tethered to a wall

–  You’re building a freezer stash (not returning to work soon)

Detailed Feature Comparison

1. Battery (The Only Real Difference)

Spectra S1:

– Built-in rechargeable lithium battery

– Lasts 2-3 full pumping sessions per charge (60-90 minutes total)

– USB-C charging (2-3 hours to full charge)

– Pump anywhere — car, park, office, airplane, bedroom

– No cord limitations

Spectra S2:

– No battery

– Must be plugged into power outlet

– 1.8m power cord (reasonably long)

– Pump location limited to near outlets

Real-world scenarios:
S1 wins when:

– Pumping at work in meeting rooms (no outlet access)

– Pumping in car during lunch break

– Traveling (hotels, family visits)

– Moving between rooms (bedroom, living room, study)

– Power outage situations

S2 works fine when:

– Dedicated pumping spot at home (desk, chair near outlet)

– Not leaving house much

– Pumping schedule is consistent (same location daily)

Battery degradation: S1 battery lasts 2-3 years of regular use before losing capacity. After 2 years, expect 1-2 sessions per charge instead of 2-3. Battery is not user-replaceable (requires Spectra service).

2. Suction Power & Performance (IDENTICAL)

Both pumps have:

– Hospital-grade suction: 38-260 mmHg (same motor)

– 12 cycle speeds: Adjustable from slow to fast

– 5 suction levels: Customize strength

– 2-phase expression: Letdown mode + expression mode

– Massage mode: For clogged ducts

Performance is 100% identical. If someone says the S1 pumps better, it’s placebo. Same motor, same suction, same output.
Average milk output (both pumps):

– 120-180ml per 20-minute double-pump session

– 20-50% more than cheaper pumps

– Comparable to Medela hospital pumps

3. Noise Level (IDENTICAL)

Both pumps: 45 decibels

What this means:

– Quieter than normal conversation (60 dB)

– Quieter than dishwasher (50 dB)

– Similar to library whisper

Real-world: You can:

– Pump in office without everyone hearing

– Pump while baby sleeps in same room

– Pump during Zoom calls (muted mic recommended!)

– Pump at night without waking partner

4. Closed System (IDENTICAL)

Both are closed systems:

– Barrier prevents milk backflow into tubing/motor

– More hygienic

– No mold growth in tubing

– Only flanges and bottles need washing (see our best bottles for breastfed babies guide)

Comparison to open systems:

– Older Medela pumps (open) = milk can enter tubing

– Spectra (closed) = impossible for milk to reach motor

– Closed = safer, cleaner, easier

5. Customization & Settings (IDENTICAL)

Both pumps have:

Letdown Mode:

– Fast, light suction (mimics baby’s initial rapid sucking)

– Stimulates milk ejection reflex

– Use for first 2-5 minutes

Expression Mode:

– Slower, deeper suction

– Extracts milk efficiently

– Use after letdown

Massage Mode:

– Helps with clogged ducts

– Gentle stimulation

– Occasional use

Adjustability:

– 12 speed options

– 5 suction levels

– 60 possible combinations

Finding your setting:

– Start low (level 3-4, speed 5-6)

– Increase until you feel slight tug (not pain)

– Most mums use level 4-5, speed 8-10

6. Night Light (IDENTICAL)

Both have built-in soft LED light.

Why it matters:

– Pump at 2am without bright overhead lights

– See bottles filling

– Don’t wake baby (or partner)

– Switch between 2 brightness levels

Minor feature but appreciated by mums who pump overnight.

7. What’s Included (IDENTICAL)

Both pumps come with:

– Main motor unit

– 2x breast shields (24mm and 28mm)

– 2x valve assemblies

– 2x backflow protectors

– 2x 150ml bottles

– Tubing set

– AC adapter (S2) / AC adapter + battery (S1)

– User manual

– Carry bag

Additional sizes needed:

– Most mums need different flange sizes

– Sizes available: 19mm, 21mm, 24mm, 27mm, 30mm, 32mm

– Measure nipple diameter before ordering

8. Weight & Portability

Spectra S1:

– Weight: 1.2kg (with battery)

– Dimensions: 26cm x 14cm x 19cm

– Fits in large handbag or nappy bag

– Truly portable

Spectra S2:

– Weight: 1.4kg (slightly heavier without battery oddly)

– Same dimensions

– Less portable due to cord requirement

– Still movable around house

Neither is small enough for discreet pumping: Both are countertop-sized pumps. For truly discreet pumping, consider wearable pumps (Elvie, Willow) — though they’re less effective.

9. Build Quality & Durability (IDENTICAL)

Both pumps:

– Solid plastic construction

– Quality motor

– Reliable performance

– Last 2+ years of daily use

Longevity:

– Expected lifespan: 3-5 years (or 2+ babies)

– Motor rarely fails

– Battery (S1 only) degrades after 2-3 years

– Both worth the investment

10. Cleaning & Maintenance (IDENTICAL)

Daily cleaning:

– 2 flanges

– 2 valves

– 2 backflow protectors

– 2 bottles

Total: 8 pieces

Cleaning method:

– Hot soapy water + bottle brush

– Or dishwasher (top rack)

– Dry thoroughly

Tubing:

– Never needs washing (closed system)

– Check occasionally for condensation

– Replace if damaged

Both pumps are equally easy to clean.

Is the S1 Worth the Extra Cost?

If you pump at work (3x daily):

– No hunting for outlets: priceless convenience

– Pump in the car or lunch room: saves 30+ min/day

– The battery earns its keep quickly

If you pump at home only:

– The battery sits unused most of the time

– The S2 is the smarter buy

If you travel often:

– Hotels, family visits, holidays: battery essential

If you pump once or twice a day at home:

– Choose the S2 and put the savings towards extra flanges, a Haakaa, nursing pads or storage bags

Real Australian Mum Reviews

S1 Reviews:

“Battery saved my sanity at work”
“I’m a teacher. No outlets in staff room, no time to hunt for them. S1 battery meant I could pump anywhere during breaks. Worth every cent.” — Melbourne mum
“Travel essential”
“We visit family in regional QLD monthly. S1 meant I could pump in the car, at relatives’ houses without asking for outlets, on planes. Battery is a lifesaver.” — Brisbane mum
“Overkill for home pumping”
“Bought S1, used battery twice in 9 months. Wish I’d just bought the S2. I pump at my kitchen table (near outlet) and never leave house.” — Sydney mum (honest review)

S2 Reviews:

“Best value”
“S2 is incredible value. Same pump as S1 for less. I pump in my bedroom and living room (both near outlets). Battery would be wasted money.” — Adelaide mum
“No regrets saving money”
“Everyone said ‘buy S1 for battery!’ but I exclusively pump at home. S2 is perfect. Used the savings for extra flanges, storage bags, and a Haakaa.” — Perth mum
“Wish I had battery”
“Bought S2 to save money. Now I’m back at work and kicking myself. Pumping at work is a hassle finding outlets. The battery would’ve been worth it.” — Canberra mum (regret)

Decision Matrix

Choose S1 if ANY of these apply:

1. You return to work within 6 months

– Office pumping: Battery essential

– Worth the extra for convenience

2. You commute >30 min each way

– Pump in car during commute/lunch

– Daycare dropoff pumping

3. You travel 2+ times/year

– Holidays, family visits

– Hotel pumping freedom

4. Your home has limited outlets

– Old house, extension cords needed

– Prefer pumping in lounge (no outlet)

5. You pump in multiple locations

– Bedroom, living room, office, outside

– Hate moving cords

6. Budget isn’t tight

– The extra cost is affordable

– “Better to have and not need than need and not have”

Choose S2 if ALL of these apply:

1. You pump primarily at home

– Not returning to work soon (or at all)

– Building freezer stash

– Occasional bottles for date nights

2. You have convenient power outlets

– Modern house with outlets everywhere

– Dedicated pumping spot near outlet

3. You want to spend less

– Budget-conscious

– Prefer investing in other baby products

4. You rarely travel

– Homebodies

– When traveling, can plan around outlets

5. Battery degradation concerns

– Don’t want battery losing capacity

– S2 will last forever (no battery to die)

Other Breast Pump Comparisons

vs Medela Swing Maxi:

– Medela: More compact, open system

– Spectra: Quieter, closed system, better value

– Winner: Spectra S2 (better features)

vs Haakaa:

– Different purposes (Haakaa is passive collector)

– Use both: Haakaa during feeds, Spectra for dedicated sessions

vs Elvie/Willow wearable:

– Wearable: Hands-free, less powerful

– Spectra: Tethered, more powerful

– Use case: Wearable for multitasking, Spectra for efficiency

vs Medela Pump in Style:

– Pump in Style: Open system, older tech

– Spectra: Closed system, quieter, better suction

– Winner: Spectra (both models)

Accessories Worth Buying

Essential (both S1 & S2):

1. Extra flanges:

– Most women need custom sizes

– 21mm and 27mm most common

– Measure nipple before ordering

2. Spare parts set:

– Extra valves, membranes, backflow protectors

– Replace every 3-6 months

– Always have backups

3. Milk storage bags:

– Freeze pumped milk

– Lansinoh or Medela brand

– 50-100 bags minimum

Nice-to-have:

4. Hands-free pumping bra:

– Type/scroll phone while pumping

– Multiask (eat, read, work)

– Life-changing accessory

5. Extra bottles:

– Pump into 6-8 bottles per day

– Wash bottles once daily instead of after each pump

6. Car adapter (S1 only):

– Charge S1 in car

– Extend battery life on long days

Warranty & Customer Service

Both models:

– 2-year manufacturer warranty

– Covers defects, motor issues

– Does NOT cover:

– Wear-and-tear parts (valves, membranes)

– User damage

– Battery degradation (S1)

Australian retailers:

– Chemist Warehouse: Easy returns (30 days)

– Baby Bunting: In-store support + price matching

– Amazon Australia: Standard Amazon returns (30 days)

Spectra customer service:

– Australian distributor: Reliable

– Replacement parts readily available

– Responsive to issues

The Bottom Line

Buy the Spectra S1 Plus if:

– You’re returning to work

– You travel frequently

– You value portability

– Budget allows the extra cost

View on Amazon

Buy the Spectra S2 Plus if:

– You pump at home primarily

– You have convenient power outlets

– You want to spend less

– Battery would rarely be used

My recommendation for most Australian mums:

– Working mums: S1 (battery worth it)

– Stay-at-home mums: S2 (save money)

– Unsure: S1 (flexibility for lifestyle changes)

Both are excellent pumps. You can’t go wrong with either — just choose based on whether you’ll use the battery.

Frequently Asked Questions