{"product_id":"att-401-replacement-battery-36v-700mah-ni-mh","title":"AT\u0026T 401 Cordless Phone Replacement Battery 3.6V 700mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eAT\u0026amp;T 401 \/ 4126 \/ 24032X — 3.6V Ni-MH Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 700mAh Ni-MH battery pack for AT\u0026amp;T cordless phone handsets. It fits the 401, 4126, 24032X, and A36 series models. The pack slots into the handset battery compartment and connects to the existing charge contacts.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003e401 and 4126 series compatibility:\u003c\/strong\u003e\n    These models share the same 3.6V single-cell NiMH format, the same footprint at 50.79 × 42.40 × 14.23mm, and the same two-contact charge interface — which is why one pack covers the full range without modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through the base station charge circuit on a 401 handset. The base accepted the NiMH voltage profile without a charge error, and the BMS held steady through full charge and idle draw.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge on 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 in cordless phones need that slow initial charge to condition the cells and reach rated capacity — a quick top-up will leave you with noticeably short talk time.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTalk time shorter than original battery after replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNiMH cells ship in a partially discharged state. The first three to five charge-and-use cycles are conditioning cycles — capacity builds each time. If talk time feels short after day one, that is expected behaviour, not a faulty pack. By cycle five, the battery should reach its rated 700mAh and hold it consistently.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows no charge or error light on new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNiMH packs that have sat in storage can drop below the voltage threshold the base station uses to detect a valid battery. The base interprets this as no pack present and will not start the charge cycle. Remove the handset, wait 10 seconds, and re-seat it firmly — this prompts the base to re-check voltage. If the error persists, the pack voltage has dropped too low; place a multimeter on the contacts and confirm you are reading at least 2.8V before re-seating.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43340085788762,"sku":"BWCS-P501CL-1","price":26.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43340085821530,"sku":"BWCS-P501CL-2","price":29.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43340085854298,"sku":"BWCS-P501CL-3","price":32.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-P501CL-1.webp?v=1778367047","url":"https:\/\/batteryweb.com\/products\/att-401-replacement-battery-36v-700mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}