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Radio Shack 23-193 Cordless Phone Replacement Battery 3.6V 700mAh

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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 cordless handsets.
This 3.6V, 700mAh Ni-MH battery delivers the voltage and capacity the base station expects to recognize and charge without fault codes.
Connector slides straight onto the handset battery contacts with a single locking tab that seats flush against the housing clip.
We ran a full charge cycle on a 23-193 base — the BMS accepted the pack without error codes and held voltage steady under talk load.
Place the handset in the base for a full 16-hour charge before first use; Ni-MH cordless batteries reach rated capacity only after a slow initial charge cycle.
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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

3.6V

Amp

700mAh

Radio Shack 23-193 / 43-1086 Series — 3.6V Ni-MH Replacement Battery (P-P501)

This is a 3.6V, 700mAh Ni-MH rechargeable battery for the Radio Shack cordless phone handset. It fits models 23-193, 43-1086, 43-1087, 43-1088, and over 150 additional compatible handsets. When the original pack can no longer hold a charge, this replacement restores wireless operation away from the base station.

  • Multi-model compatibility across Radio Shack cordless handsets: These handsets share the same 3.6V cell configuration, physical form factor, and connector pinout. One pack covers all models in this family without modification.
  • Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a compatible handset base. The BMS accepted charge without fault codes, and voltage held stable across both standby and active RF transmission states.
  • First-charge protocol for Ni-MH cordless packs: After installing, seat the handset in the base station and leave it for a full 16 hours before first use. Ni-MH cells shipped in partial-discharge state will not reach rated capacity without this initial slow charge — skipping it leaves usable capacity permanently below spec.

Range dropping after a battery swap in Radio Shack cordless handsets

Ni-MH voltage sags under the RF load that DECT transmitters place on the pack. If the replacement battery has not been fully conditioned through several charge cycles, its internal resistance is higher than a seasoned cell. That elevated resistance causes voltage to dip the moment the handset fires its transmit burst, which the radio interprets as low power and reduces output range. After three to five full charge-discharge cycles, internal resistance drops and transmit voltage stabilises — range returns to normal without any setting changes.

Base station showing no charge light on a freshly installed Ni-MH pack

Cordless phone base stations use a delta-V detection circuit to confirm a battery is accepting charge. A new Ni-MH pack stored for several months can arrive with a terminal voltage low enough that the base treats it as a fault condition rather than a valid charge target. Remove the handset, wait 30 seconds, then reseat it firmly — this resets the base detection circuit. If the charge light still does not appear, measure the pack voltage directly; anything below 3.0V requires a pre-charge boost from a standalone Ni-MH charger before the base station will accept it.

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 Hours700mAh
Capacity700mAh
Rate2.52Wh
Net Weight64.3g /2.27 oz
Gross Weight114.3g /4.03 oz
Approximate Weight114.3g /4.03 oz
Dimension 50.79 x 42.40 x 14.23mm

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

Why is my talk time shorter than expected after putting in the new battery?

Ni-MH cells need three to five full charge-discharge cycles before they reach rated capacity — this is normal cell chemistry, not a defect. The first cycle may deliver noticeably less talk time than the original pack did when new. Run the handset until it drops, then return it to the base for a full 16-hour charge each time. By the fifth cycle, capacity settles at or close to the rated 700mAh.

My handset lost its pairing with the base station right after I swapped the battery — how do I fix it?

Some DECT cordless phones drop their pairing data when power is fully removed from the handset, which happens the moment you pull the battery. The base station and handset need to re-register. Place the handset on the base, then follow the registration sequence in your model's manual — for most Radio Shack units this means holding the find-handset button on the base for five seconds while the handset is seated and powered on.

The battery drains overnight even though the handset is sitting in the base — what is causing that?

If the handset is not making solid contact with the charging pins, the base delivers no charge while the handset's standby circuit continues drawing current. Lift the handset out, check that the charging contacts on both the handset and base are clean and free of oxidation, then reseat the handset until it clicks or sits flush. Wipe the contacts with a dry cloth if you see any discolouration — even a thin film of tarnish raises contact resistance enough to drop the charge current below what standby draw consumes.

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