{"product_id":"radio-shack-43-3529-replacement-battery-36v-800mah-ni-mh","title":"Radio Shack 43-3529 Cordless Phone Replacement Battery 3.6V 800mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eRadio Shack 43-3529 \/ 43-3538 Series — 3.6V Ni-MH Replacement Battery (BBTY0457001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 800mAh Ni-MH battery pack for Radio Shack cordless phone handsets. It fits the 43-3529, 43-3538, 43-3553, 43-3554, and more than two dozen additional Radio Shack handset models. The pack replaces OEM part numbers BBTY0457001, BBTY0458001, BT-446, GP80AAALH3BMX, and BT1005.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eMulti-model fit across the 43-series lineup:\u003c\/strong\u003e\n    These handsets share the same 3.6V three-cell AAA Ni-MH configuration, matching connector pin-out, and identical BMS handshake with the base charging cradle — which is why one pack covers so many model numbers across this Radio Shack cordless range.\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 43-series handset. The base station accepted the charging handshake without error, and the BMS held voltage steady across the full discharge curve without false low-battery cutoffs.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst-charge protocol for Ni-MH cordless packs:\u003c\/strong\u003e\n    Place the handset in the base cradle for a full 16 hours before first use. Ni-MH cells shipped in a partially discharged state do not reach rated capacity on a short initial charge — skipping this step is the single most common cause of shorter-than-expected talk time from day one.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRange drops mid-call after fitting a new Ni-MH pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe DECT radio module in these handsets draws a surge of current each time it transmits. A Ni-MH pack that has not completed its first few conditioning cycles shows a sharper voltage sag under that RF load. When voltage sags below the radio module's minimum operating threshold, transmit power drops — and so does range. Run three to five full charge-discharge cycles through normal use, and the cells reach rated capacity. After that, voltage sag under RF load returns to normal levels.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBase station shows no charge light or flashes an error after battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eNi-MH packs that have sat in storage can arrive with a resting voltage below the level the base station expects before it begins a charge cycle. Some Radio Shack bases read a voltage below roughly 3.0V as a fault condition and refuse to initiate charging. Remove the handset, wait 30 seconds, and reseat it firmly — full contact on both charging pins is required. If the error persists, check resting voltage across the battery terminals with a multimeter; a reading above 3.0V confirms the pack is within the base's acceptance window and the issue is a contact or seating problem, not the battery itself.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43340086968410,"sku":"BWCS-BT446CL-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43340087001178,"sku":"BWCS-BT446CL-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43340087033946,"sku":"BWCS-BT446CL-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-BT446CL-1.webp?v=1778367024","url":"https:\/\/batteryweb.com\/products\/radio-shack-43-3529-replacement-battery-36v-800mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}