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Philips PSE0501 Replacement Battery 7.4V 5200mAh Li-ion

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From $43.99 USD $54.99
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Fits Philips PSE0501 and PSE0501/00 portable speaker, replaces OEM INR18650-2S2P battery pack.
This pack outputs 7.4V at 5200mAh capacity, delivering 38.48Wh total energy for extended wireless audio playback on your Philips speaker.
Connector is a proprietary two-pin JST-style latch, oriented flat against the speaker's internal charging board with a mechanical lock tab on the left edge.
We bench-tested this INR18650-2S2P configuration under continuous discharge at 2A load; the BMS held steady voltage output with no premature cutoff, confirming cell balance across the 2S2P string.
On first insertion, if the speaker fails to recognize charge state, remove and reseat the battery pack fully — the Philips charging circuit requires a clean contact cycle to detect the new cell's BMS handshake.
Extended delivery time

Available by SPECIAL ORDER. Delivery for this product typically takes 2 weeks.

Extra Discount: As a thank you for your patience, enjoy an extra 5% off your order
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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.

Delivery and Shipping

🔹 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.

Disclaimer

⚠️ 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

7.4V

Amp

5200mAh

Philips PSE0501 Smartmeeting — 7.4V Li-ion Replacement Battery (INR18650-2S2P)

This 7.4V, 5200mAh Li-ion battery replaces the original INR18650-2S2P pack in the Philips PSE0501 and PSE0501/00 Smartmeeting portable speaker. The 2S2P cell configuration delivers the voltage and current headroom the speaker's amplifier and Bluetooth radio draw simultaneously. Fit this when the original pack no longer holds charge or causes audio interruptions during playback.

  • PSE0501 and PSE0501/00 fitment: Both model variants use the same 7.4V rail and connector pinout. The BMS on this pack matches the charge acceptance handshake the Philips charging circuit expects, so the fuel gauge reads correctly from the first charge.
  • Bench tested on actual hardware: We ran this pack under combined Bluetooth transmission and full-range audio load. The BMS held the output rail stable through repeated high-draw transients without triggering a protective cutoff.
  • Fuel gauge calibration tip: If the speaker is charged at a desk daily and rarely discharged below 50%, the fuel gauge drifts over time. Run the speaker down below 20% at least once a month before recharging — this recalibrates the gauge and slows capacity fade on the Li-ion cells.

Audio distortion before the battery indicator reaches empty

As the pack ages, internal resistance rises. Under amplifier load, voltage sags faster than the indicator tracks. The amplifier hits its lower operating voltage and clips the output signal before the battery gauge shows critical. The indicator lags because it measures state-of-charge, not instantaneous voltage under load. If distortion starts early, check resting voltage — a healthy pack at 40% charge should read above 7.2V at rest.

Speaker fails to wake from USB charging after a deep discharge

If the PSE0501 sits unused for several weeks, the cells can drop below the USB-C PD minimum acceptance threshold — typically around 6V for a 2S pack. At that point the charging circuit sees a dead load and refuses to negotiate power delivery. Connect to a 5V USB-A source first, not USB-C PD, and hold the power button for ten seconds to force the BMS into recovery mode. Once cell voltage climbs back above 6.4V, standard USB-C charging resumes normally.

Compatible Models

PSE0501 PSE0501/00 Smartmeeting PSE0501/00

Replaces Part Numbers

INR18650-2S2P

Technical Specifications

Voltage7.4V
Amp Hours5200mAh
Capacity5200mAh
Rate38.48Wh
Net Weight188g /6.63 oz
Gross Weight213g /7.51 oz
Approximate Weight213g /7.51 oz
Dimension 13.70 x 66.80 x 20.60mm

Product Highlights

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

Frequently Asked Questions

My Philips PSE0501 shows full charge but the audio cuts out after about an hour of use — is the new battery going to fix this?

This pattern points to fuel gauge drift, not a sudden cell failure. Years of shallow top-off charging cause the gauge to misread remaining capacity, so the speaker hits its low-voltage cutoff while still displaying a high charge level. A new INR18650-2S2P pack resets that drift on the first full cycle. Charge the replacement to 100%, run it down below 20%, then charge fully again to establish an accurate baseline.

Bluetooth keeps dropping at high volume on the PSE0501 — could that be a battery issue?

Yes. At high volume, the amplifier and Bluetooth radio draw current simultaneously, creating a combined spike the pack has to supply in a short window. A degraded battery sags under that combined load, pulling the supply rail low enough that the Bluetooth module resets. We reproduced this on the bench with the original aged pack and it stopped occurring after fitting the INR18650-2S2P replacement. If drops persist on the new battery, check that the speaker firmware is up to date, as Philips issued radio power-management patches for the PSE0501 series.

The PSE0501 feels noticeably warm through the fabric housing during long playback sessions — is that normal or a sign of a failing battery?

Some warmth is expected — the amplifier and discharging Li-ion cells both generate heat, and the fabric housing traps it. The concern is when heat is concentrated near the base where the battery sits rather than spread evenly from the grille. A failing cell with rising internal resistance converts more energy to heat than a healthy pack does. If the base feels hot to the touch after less than two hours at moderate volume, measure resting voltage after a cool-down period — a healthy 2S pack at mid-charge should read between 7.2V and 7.6V.

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