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JBL Pulse 3 Version 2 Replacement Battery 3.7V 5800mAh

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From $34.99 USD $43.99
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Fits JBL Pulse 3 Version 2 portable speaker, replaces OEM part P5542100-P2.
3.7V, 5800mAh Li-Polymer cell powers audio playback and synchronized LED effects.
Connector seats flat against the speaker's internal contact pads with no locking tab required.
We ran full discharge cycles on the bench — BMS engaged protection at 2.5V, voltage recovery clean on recharge.
On first insertion, the Pulse 3 may not detect charge state for two hours — this is normal BMS handshake on a fresh cell, power cycle the speaker once if needed.
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Battery Care Tips

🔹 Getting Started

Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.

🔹 Keep It Healthy

Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.

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🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.

🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

3.7V

Amp

5800mAh

JBL Pulse 3 Version 2 — 3.7V Li-Polymer Replacement Battery (P5542100-P2)

This 3.7V, 5800mAh lithium-polymer battery is a direct replacement for the JBL Pulse 3 Version 2 portable Bluetooth speaker. It restores power to both the audio amplifier and the onboard LED light ring. Fit the original P5542100-P2 footprint: 116.60 × 41.30 × 11.00mm.

  • Pulse 3 Version 2 fit: The Pulse 3 Version 2 runs a single-cell Li-Polymer pack that feeds both the amplifier board and the light controller simultaneously. The P5542100-P2 matches the OEM connector pinout and cell dimensions so both subsystems receive the correct voltage rail without modification.
  • Bench tested on actual hardware: We cycled this pack through combined audio-plus-LED load on the Pulse 3 Version 2 board. The BMS held charge termination at 4.2V and triggered low-voltage cutoff cleanly at 3.0V with no false trips under the amplifier's dynamic current draw.
  • Light-ring charging discipline: The Pulse 3 Version 2 draws extra current when the LED ring runs at full brightness during charge. Avoid leaving the speaker plugged in with the light ring active for extended periods — combined charge current plus light-draw heat accelerates cell degradation faster than audio-only use.

Why the Pulse 3 Version 2 shows full charge but audio drops after extended play

The Pulse 3 Version 2 fuel gauge reads state-of-charge from a coulomb counter, not a direct voltage measurement. When a degraded cell's actual capacity shrinks, the counter still reports a high percentage until the voltage suddenly collapses under amplifier load. That collapse triggers BMS protection before the indicator reaches empty. Replacing the cell resets the usable capacity the counter has to track, so the gauge and real-world output align again.

USB wake-up failing on a deeply discharged Pulse 3 Version 2

If the speaker sits unused for several weeks, the cell can drop below the USB-C PD minimum acceptance voltage — typically around 2.5V — and the charging circuit refuses to negotiate a session. The speaker appears completely dead with no LED response on plug-in. Connect it to a USB-A 5V charger rather than a USB-C PD source; the lower-power trickle path can coax the BMS back into accepting charge. Once the cell recovers above 3.0V, switch to a standard USB-C cable for a full charge.

Compatible Models

Pulse 3 Version 2

Replaces Part Numbers

P5542100-P2

Technical Specifications

Voltage3.7V
Amp Hours5800mAh
Capacity5800mAh
Rate21.46Wh
Net Weight104.2g /3.68 oz
Gross Weight154.2g /5.44 oz
Approximate Weight154.2g /5.44 oz
Dimension 116.60 x 41.30 x 11.00mm

Product Highlights

  • Brand: JBL
  • Manufacturer: CS
  • Series: Standard
  • Color: Blue
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My Pulse 3 Version 2 cuts out and restarts at high volume even with a new battery — what's happening?

High volume pushes the amplifier into short current spikes that can exceed 2A on the 3.7V rail. If the new cell's internal resistance is slightly elevated from storage, voltage sags enough during those spikes to trip the BMS protection circuit, which the speaker interprets as a fault and restarts. Run the speaker at moderate volume for the first few charge cycles — this conditions the cell and lowers internal resistance. After two to three full cycles, high-volume cutouts typically stop.

Audio sounds distorted and clipped well before the battery indicator reaches empty — is that a battery issue?

Yes. As the cell discharges toward 3.4V, the amplifier's supply voltage drops below the threshold needed to drive full output cleanly, causing clipping before the BMS hits its low-voltage cutoff. The indicator still shows remaining charge because the coulomb counter hasn't zeroed out. This is normal Li-Polymer behaviour under amplifier load — it is not a fault with the replacement cell. To confirm, check the voltage across the battery terminals during playback; anything below 3.5V under load will produce audible distortion on this speaker.

The Pulse 3 Version 2 plays for noticeably less time than it used to even though I charge it every night — what causes that?

Topping the battery off from 80–100% every night without letting it discharge below 50% is shallow cycling, and it accelerates capacity fade on lithium-polymer cells. The charger repeatedly stresses the top portion of the charge curve where cell chemistry degrades fastest. Let the speaker run down below 20% at least once a month before recharging fully. That single full discharge cycle recalibrates the fuel gauge and exercises the full usable capacity of the cell.

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