{"product_id":"uniden-tru-c46-replacement-battery-37v-750mah-li-ion","title":"Uniden TRU-C46 Replacement Battery BT-925 3.7V 750mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eUniden TRU-C46 \/ TRU-C56 — 3.7V Li-ion Replacement Battery (BT-925)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.7V Li-ion battery rated at 750mAh (2.78Wh), built to replace the OEM BT-925 pack in Uniden TRU-C46 and TRU-C56 cordless phone handsets. It fits the battery bay directly and connects via the same terminal layout as the original. Voltage and capacity match what the handset's charging circuit expects.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTRU-C46 and TRU-C56 compatibility:\u003c\/strong\u003e\n    Both handsets run on the same 3.7V single-cell Li-ion platform and share the BT-925 form factor, connector pinout, and BMS handshake requirements. One replacement covers either model.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this cell through charge acceptance and load discharge on the TRU-C46 handset. The BMS accepted the base station charge signal without fault, and voltage held stable across both talk and standby draw cycles.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst charge on Li-ion cordless handsets:\u003c\/strong\u003e\n    After installing this battery, seat the handset in the base and leave it for a full uninterrupted charge before first use. Li-ion cells that ship in storage-state can trigger a shallow charge termination if pulled early — the base needs time to bring the cell up from its resting voltage to full capacity.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the TRU-C46 loses range after a battery swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eDECT handsets draw a spike of current each time they transmit to the base station. If the replacement battery's internal resistance is higher than expected — or if the cell hasn't completed its first full charge cycle — voltage sags under that RF transmit load. The handset's RF output drops to compensate, which shortens the usable range between handset and base. Running two or three full charge-discharge cycles brings the cell's internal resistance down and stabilises transmit voltage.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eHandset not pairing with base after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eRemoving the battery on some Uniden DECT handsets wipes the pairing registration stored in the handset's volatile memory. When the new battery is installed, the handset powers up without a stored base ID and shows no line or signal. To fix this, re-register the handset from the base station menu — on the TRU-C46, hold the FIND HANDSET button on the base for five seconds while the handset is powered on to re-initiate pairing.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43340054855770,"sku":"BWCS-CPB9052-1","price":21.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43340054888538,"sku":"BWCS-CPB9052-2","price":24.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43340054921306,"sku":"BWCS-CPB9052-3","price":26.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-CPB9052-1.webp?v=1778367024","url":"https:\/\/batteryweb.com\/products\/uniden-tru-c46-replacement-battery-37v-750mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}