{"product_id":"att-replacement-battery-24v-600mah-ni-mh","title":"AT\u0026T STB-93 Cordless Phone Replacement Battery 2.4V 600mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAT\u0026amp;T STB-93 — 2.4V Ni-MH Replacement Battery for Cordless Handsets\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 2.4V, 600mAh Ni-MH rechargeable battery built to replace the OEM STB-93 pack in AT\u0026amp;T cordless phone handsets. It restores power to handsets that no longer hold a charge or fail to power on. Voltage and chemistry match the original spec exactly — the base station charges it the same way it charged the factory pack.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eSTB-93 compatibility across AT\u0026amp;T handsets:\u003c\/strong\u003e\n    AT\u0026amp;T used the STB-93 across several cordless handset lines that share the same 2.4V NiMH cell format, connector footprint, and charge-acceptance curve. The base station's trickle-charge circuit expects NiMH chemistry — swapping to a different chemistry type would cause incorrect charge termination.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through charge and discharge on a 2.4V NiMH-compatible bench charger. The BMS accepted charge immediately at the correct voltage and held capacity within spec across three full cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for NiMH cordless packs:\u003c\/strong\u003e\n    After installing, seat the handset in the base and leave it for a full 16 hours before first use. NiMH cells at storage charge will not reach rated capacity on a short initial charge — the slow base-station trickle is what conditions the cells to 600mAh.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy talk time stays short for the first few cycles on a new NiMH pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNiMH cells ship at a partial state of charge to meet transport safety requirements. The cells do not reach their rated 600mAh straight away — capacity builds across three to five full charge-discharge cycles. This is normal cell behaviour, not a fault with the battery. By cycle four or five, talk time will stabilise at the rated level.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station charge light not activating with the new pack installed\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eAT\u0026amp;T base stations use a voltage threshold to detect whether a battery is present and ready to accept charge. A NiMH pack that has self-discharged during storage can sit below that threshold, causing the base to show no charge activity or an error light. Remove the handset, wait 10 seconds, then re-seat it firmly — this prompts the base to re-check the voltage. If the light still does not activate, connect the handset to the base for 30 minutes with the handset powered off, then reseat — the trickle current will bring the cell voltage up to the acceptance threshold of approximately 2.0V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43340097912922,"sku":"BWCS-P305CL-1","price":20.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43340097945690,"sku":"BWCS-P305CL-2","price":23.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43340097978458,"sku":"BWCS-P305CL-3","price":25.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-P305CL-1.webp?v=1778367187","url":"https:\/\/batteryweb.com\/products\/att-replacement-battery-24v-600mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}