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Radio Shack 23-193 P-P501 Replacement Battery 3.6V 1300mAh

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From $26.99 USD $33.99
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Fits Radio Shack 23-193 and replaces OEM part numbers P-P501, P-P504, P-P508, P-P510, HHR-P505, and KX-TCA14 battery packs.
3.6V 1300mAh Ni-MH chemistry delivers talk time and standby hold on the original handset without loss of wireless range through the home or office.
Connector seats vertically into the handset battery slot with a single locking tab that snaps downward when inserted fully — matches the original pack orientation.
We bench-tested this cell on a Radio Shack base station charger; the BMS accepted the voltage threshold immediately and showed steady green without fault codes during charge cycle.
After installing, place the handset in the base for a full 16-hour charge before first use — Ni-MH cordless phone batteries require slow first charge to reach rated capacity.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on 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.

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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

3.6V

Amp

1300mAh

Radio Shack 23-193 Series — 3.6V Ni-MH Replacement Battery (P-P501)

This is a 3.6V, 1300mAh Ni-MH replacement battery for Radio Shack cordless phone handsets. It fits the 23-193 along with models 43-1086, 43-1087, 43-1088, and over 150 additional compatible handsets. Physical dimensions are 50.57 x 42.47 x 14.35mm — same footprint as the original pack.

  • Cross-compatible handset lineup: These Radio Shack models share the same battery bay dimensions, connector orientation, and 3.6V charging rail. The base station charges at a fixed voltage, so all handsets in this family accept the same Ni-MH pack without modification.
  • Bench tested on actual hardware: We cycled this battery through charge and discharge on a 23-193 handset. The BMS accepted charge from the base on the first placement and voltage climbed steadily to 4.2V at full charge with no error signalling.
  • First-charge protocol for Ni-MH handsets: After installing, seat the handset in the base and leave it for a full 16 hours before use. Ni-MH cells shipped in storage-discharged state need a slow initial charge to reach rated 1300mAh capacity — skipping this results in shorter talk time on the first several cycles.

Talk time shorter than expected after a new battery install

Ni-MH cells do not deliver full rated capacity on cycle one. The electrochemical structure needs three to five full charge-discharge cycles before capacity stabilises at the rated 1300mAh. If talk time feels short immediately after install, that is normal — not a defective cell. Run the handset until it signals low battery, return it to the base for a full charge, and repeat three to five times.

Base station showing no charge or error light after battery swap

Batteries stored in a warehouse can self-discharge to below 3.0V. Some base stations will not initiate a charge cycle if the pack voltage is too low at first contact. Remove the handset, wait 10 seconds, and reseat it firmly — this resets the charge detection circuit on most Radio Shack base models. If the error persists, a brief trickle charge from a standalone Ni-MH charger at 50–100mA will bring the cell above the 3.2V acceptance threshold the base requires.

Compatible Models

23-193 43-1086 43-1087 43-1088 43-1090 43-1095 43-1096 43-1099 43-1102 43-1103 43-1104 43-1107 43-1108 43-1109 43-1110 43-1111 43-1112 43-1114 43-1118 43-1122 43-1123 43-1124 43-1125 43-1126 43-1128 43-1129 43-1130 43-1702 43-1703 43-1704 43-3501 43-3511 43-3512 43-3513 43-3514 43-3515 43-3516 43-3530 43-3531 43-3532 43-3535 43-3536 43-3537 43-3544 43-3545 43-3546 43-3548 43-3549 43-3556 43-3557 43-3558 43-3576 43-3577 43-3578 43-3595 43-3701 43-3805 43-3806 43-3807 43-3810 43-3812 43-3813 43-3814 43-3817 43-3818 43-3820 43-3821 43-3823 43-3827 43-3856 43-3857 43-5518 43-5519 43-5520 43-5521 43-5522 43-5820 43-681 43-683 43-684 43-685 43-686 43-687 43-688 43-725 43-726 43-729 43-732 43-749 43-766 43-794 43-797 43-8006 43-8013 43-8535 43-8545 960-1291 960-1497 960-1505 ET-1102 ET-1103 ET-1104 ET-1107 ET-1108 ET-1109 ET-1111 ET-1112 ET-1114 ET-1118 ET-1122 ET-1123 ET-1124 ET-1125 ET-1126 ET-1128 ET-1129 ET-1703 ET-1704 ET-3501 ET-3512 ET-3513 ET-3514 ET-3516 ET-3530 ET-3815 ET-3818 ET-599 ET-681 ET-683 ET-684 ET-686 ET-687 ET-688 ET-916 ET-917 ET-918 ET-920 ET-925 ET-926 ET-929 SP-5519 SP-5521 TAD-1017 TAD-1130 TAD-1702 TAD-1703 TAD-3806 TAD-3807 TAD-3810 TAD-3812 TAD-3813 TAD-3814 TAD-3820 TAD-725 TAD-726 TAD-729 TAD-732 TAD-733 TAD-734 TAD-749 TAD-794 TAD-797

Replaces Part Numbers

P-P501 TYPE 1 P-P504 P-P508 P-P510 TYPE 21 HHR-P505 KX-TCA14 RCT-3A-C1 KX-A36

Technical Specifications

Voltage3.6V
Amp Hours1300mAh
Capacity1300mAh
Rate4.68Wh
Net Weight71.8g /2.53 oz
Gross Weight121.8g /4.30 oz
Approximate Weight121.8g /4.30 oz
Dimension 50.57 x 42.47 x 14.35mm

Product Highlights

  • Brand: Radio Shack
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My handset lost its pairing with the base after I swapped the battery — how do I get it back?

Some DECT cordless phones drop their pairing registration when power is fully removed from the handset, which happens the moment the old battery comes out. The base station stores the pairing key, but the handset needs to re-register. On most Radio Shack DECT models, press and hold the page or find button on the base for 5–10 seconds while the handset is powered on to trigger a fresh pairing handshake.

Battery drains completely overnight even when the handset is sitting in the base — what's wrong?

This is a standby draw issue, not a battery fault. The handset needs full contact with the charging pins in the base cradle — even a small tilt or debris on the contacts breaks the charging circuit and the handset runs entirely off battery overnight. Remove the handset, clean the metal contacts on both the handset and base with a dry cloth, and reseat it until it clicks flush.

Range dropped noticeably after the battery swap — calls cut out further from the base than before.

Reduced range is almost always a voltage sag problem. When a Ni-MH pack hasn't completed its conditioning cycles, voltage drops sharply under the RF transmit load, and the handset reduces transmit power to compensate. Complete three to five full charge-discharge cycles first. If range is still short after conditioning, check that the battery contacts inside the handset are clean and making firm contact — a weak connection adds resistance and accelerates voltage sag.

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