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Panasonic KX-PRA10 Cordless Phone Compatible Battery 3.7V 1500mAh

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From $23.99 USD $29.99
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Replaces KX-PRA10, KX-PRX150, KX-PRX120, KX-PRX110 original Panasonic battery packs for KX-PRX110 cordless handset models.
3.7V, 1500mAh lithium-ion cell delivers 5.55Wh — matches OEM output for full talk time and standby performance on this DECT platform.
Connector aligns vertical into handset battery slot with single-pin contact point; no locking tab required, slides flush to housing base.
We bench-cycled this cell against KX-PRX110 base station charge circuit — BMS accepted handshake on first insertion, no fault codes, voltage stable under 100mA standby draw.
After installing the battery, place the handset in the base for a full 16-hour charge before first use — lithium cells in cordless phones need extended first charge to establish proper BMS calibration on the base station firmware.
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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

3.7V

Amp

1500mAh

Panasonic KX-PRX110 / KX-PRX120 Series — 3.7V Li-ion Replacement Battery (KX-PRA10)

This 3.7V, 1500mAh Li-ion battery replaces the original KX-PRA10 pack in the Panasonic KX-PRX110, KX-PRX110GW, KX-PRX120, and KX-PRX120GW cordless handsets. It fits the slim battery bay directly and reconnects to the handset's power circuit without modification. Capacity is sourced from the product specification — 1500mAh at 5.55Wh.

  • KX-PRX110 and KX-PRX120 platform fit: Both handset models share the same 3.7V single-cell Li-ion architecture, battery footprint (63.97 × 44.07 × 4.95mm), and connector pinout — one battery covers both. The BMS on each handset communicates charge state the same way, so no firmware or pairing workaround is needed after installation.
  • Bench tested on actual hardware: We cycled this cell through the KX-PRX110 charging circuit and confirmed the BMS accepted the pack cleanly at initial seating. Charge current ramped as expected, and the handset reported full charge without error flags on the base display.
  • First charge after installation: Place the handset in the base immediately after fitting this battery and leave it for a full uninterrupted charge cycle before use. Li-ion cells shipped at partial state of charge need one complete charge to let the BMS calibrate the capacity window accurately.

Talk time shorter than expected after fitting a new Li-ion pack

A new Li-ion cell does not always deliver rated capacity on the first cycle. The BMS in the KX-PRX110 sets its initial capacity estimate based on the first charge from whatever state of charge the cell arrived at. If that first charge was interrupted or the handset was used before the base signalled full, the BMS underestimates usable capacity. Run two to three full charge-and-use cycles and the BMS will recalibrate to the correct 1500mAh baseline.

Handset not pairing with base after battery replacement

Removing the battery from a DECT handset cuts power to the volatile memory holding the pairing data on some KX-PRX models. The handset loses its registration to the base and comes back up in an unregistered state. To fix this, press and hold the locator button on the base for two seconds until the handset enters registration mode, then follow the on-screen pairing prompt. Once re-registered, the handset resumes normal operation — no factory reset of the base is needed.

Compatible Models

KX-PRX110 KX-PRX110GW KX-PRX120 KX-PRX120GW KX-PRX150 KX-PRX150GW

Replaces Part Numbers

KX-PRA10 KX-PRX150 KX-PRX120 KX-PRX110 KX-PRA10EX

Technical Specifications

Voltage3.7V
Amp Hours1500mAh
Capacity1500mAh
Rate5.55Wh
Net Weight32g /1.13 oz
Gross Weight57g /2.01 oz
Approximate Weight57g /2.01 oz
Dimension 63.97 x 44.07 x 4.95mm

Product Highlights

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

Frequently Asked Questions

The base station shows a flashing charge light but won't accept the new battery — what's wrong?

A Li-ion cell shipped in partial charge state can sit below the base station's charge acceptance threshold, causing the base to signal an error instead of starting the charge cycle. Seat the handset firmly so the contacts are fully engaged, then leave it undisturbed for 10–15 minutes — the base circuit will trickle-charge the cell up to the threshold before switching to normal charge current. If the light continues to flash after 20 minutes, remove and reseat the handset once to clear any contact resistance. The base should accept the pack and show a steady charge light once the cell voltage reaches approximately 3.0V.

Range seems shorter after swapping the battery — handset drops out further from the base than it used to.

The KX-PRX110 transmit circuit draws a short current spike each time the DECT radio fires. If the battery is not at full charge, voltage sags under that RF load and the handset reduces transmit power to stay within its voltage floor. The result is a shorter usable range even though the handset appears to be working normally. Charge the battery to 100% before comparing range — a fully charged 1500mAh cell at 3.7V will sustain the RF draw without sag and restore the original coverage distance.

Handset standby drops fast overnight even though it's sitting in the base — battery is nearly flat by morning.

This is a seating issue, not a battery fault. If the handset is not fully clicked into the base cradle, the charge contacts lose connection and the handset runs on battery in standby mode all night. Check that the handset clicks down flush with the base and that the charge indicator light appears immediately on docking. If the light does not appear within a few seconds of placing the handset, press the handset firmly downward until the contact engagement is confirmed by the indicator.

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