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Rhythm Battery for P2-S3 and P2-S4 Double Battery

Genuine double battery set for the Rhythm P2-S3 and P2-S4 portable oxygen concentrators.

Rated 5 out of 5 based on 2 customer ratings

(2 customer reviews)

US$230.00

In stock

Call (786) 755-8063

Genuine double battery set for the Rhythm P2-S3 and P2-S4
Extended runtime — the listing estimates up to about 8 hours combined (setting-dependent)
Recharges fully in about 3 to 4 hours
Tool-free, easy to install and swap
Ships free in the USA

Genuine double battery set for the Rhythm P2-S3 and P2-S4
Extended runtime — the listing estimates up to about 8 hours combined (setting-dependent)
Recharges fully in about 3 to 4 hours
Tool-free, easy to install and swap
Ships free in the USA

Genuine OEM partFree shipping on orders $99+Ships from Miami, FLExpert help · (786) 755-8063

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VISAAMEXDISC●VERaffirm

Brand: Rhythm Healthcare
SKU: S3BY001D
Category: Batteries

In short

Double the run for your P2-S3 or P2-S4

The S3BY001D is the genuine double battery set for the Rhythm P2-S3 and P2-S4 portable oxygen concentrators. The two-pack extends runtime for full days out — the listing estimates up to about 8 hours combined — and recharges in about 3 to 4 hours.

A genuine two-battery set that keeps your Rhythm P2-S3 or P2-S4 going for long days and travel.

✅ Rhythm P2-S3 ✅ Rhythm P2-S4 ❌ Rhythm P2 ❌ Rhythm P2-E6 ❌ Rhythm P2-E7 ❌ Rhythm TOC3

Shop the compatible concentrator: Rhythm P2-S3 · Rhythm P2-S4

Longer days

Two genuine packs extend your time between charges — the listing estimates up to about 8 hours combined, setting-dependent.

P2-S3 & P2-S4

Made for the Rhythm P2-S3 and P2-S4. It does not fit the P2, P2-E6, P2-E7, or TOC3.

Easy to install

Tool-free and simple to replace or swap — no professional help needed.

Details

What's included

A genuine Rhythm double battery set (part S3BY001D) for the P2-S3 and P2-S4. Chargers and power supplies are sold separately unless noted.

Why genuine matters

Genuine Rhythm packs are built to the P2-S3/S4's power and safety spec for a secure fit and reliable output. The S3/S4 batteries come as single, double, and triple sets, so you can match capacity to how long you're away from a charger. Exact runtime varies by setting — ask us to confirm for your device.

Frequently asked questions

Which models does this fit?

The Rhythm P2-S3 and P2-S4 only. It does not fit the P2, P2-E6, P2-E7, or TOC3 — those use different batteries.

Single, double, or triple — which do I need?

They scale with how long you're out: single (S3BY001S) for short trips, this double for full days, and triple (S3BY001T) for the longest range. The more packs, the longer the combined runtime.

How long does it last?

The listing estimates up to about 8 hours combined for the double, but runtime depends on your flow setting. Contact us and we'll confirm for your setting.

Is it genuine?

Yes, a genuine Rhythm battery set for the P2-S3 / P2-S4. It ships free in the USA.

Can I fly with it?

They're lithium-ion, so airline rules for spare batteries in carry-on apply. Check your airline's policy before traveling.

Not sure this is the right part?

Send us a photo or call — we'll confirm the exact part for your unit.

Call (786) 755-8063

Dimensions	8 × 5 × 3 in
Condition	New
Accessory Type
Family Type
Role Type
Compatible with	Rhythm P2-S3, Rhythm P2-S4

2 reviews for Rhythm Battery for P2-S3 and P2-S4 Double Battery

5.0

Based on 2 reviews

100

100%

Rated 5 out of 5

cleo (verified owner) – 11 July, 2025

A lot of charge without the bulk or weight
This battery is perfect, allowing me to be mobile for longer.
Rated 5 out of 5

Paul Bugnacki (verified owner) – 1 July, 2025

Great Battery Deal
Great service by this company.