{"product_id":"technicolor-tca203-replacement-battery-37v-4500mah-li-polymer","title":"Technicolor TCA203 Replacement Battery 3.7V 4500mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eTechnicolor TCA203 Series — 3.7V Li-Polymer Replacement Battery (BP-TCA-12\/2510 SN)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V, 4500mAh Li-Polymer cell replaces the backup battery in the Technicolor TCA203 alarm system control panel. It fits the TCA203, TCA203COMG, iControl TCA203TWC, and iControl TCA203 panels. When mains power drops, this cell keeps the keypad, communication module, and alarm monitoring active.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTCA203 panel family compatibility:\u003c\/strong\u003e\n    All listed TCA203 variants share the same 3.7V power rail, connector pinout, and BMS handshake protocol. The cell slot and charge circuit are identical across this panel range, so one part number covers the full group.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this cell through the TCA203 charge controller and confirmed the BMS accepted the cell without fault codes. The protection circuit responded correctly to both low-voltage cutoff and overcharge thresholds at 3.7V nominal.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003ePost-installation float charge period:\u003c\/strong\u003e\n    Do not run a zone or siren diagnostic immediately after fitting this cell. The panel charge controller needs 24–48 hours to bring the new cell to full float charge. Running a test before that window closes can trigger a false low-battery report from the panel's BMS.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eAlarm panel losing programming during a power outage after battery replacement\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA freshly installed cell may not yet be accepted by the panel's backup circuit. Until the TCA203 charge controller completes its conditioning cycle — typically 48 hours on mains — the battery is not fully integrated as a backup source. During that window, a mains interruption can cause the panel to drop to zero volts internally, wiping zone programming and user codes. Keep the panel on mains power for at least 48 hours before testing backup operation.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003ePanel reports low battery within hours of fitting a new cell\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThis is a BMS reporting issue, not a faulty cell. The TCA203 panel checks battery state-of-charge shortly after power-up, and a new cell at resting voltage reads below the panel's \"full\" threshold until the charge controller has topped it up. The low-battery alert clears once the cell reaches approximately 4.2V after a full float charge cycle. Leave the panel on mains for 24–48 hours and the fault should clear without any manual reset.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43309828603994,"sku":"BWCS-TCA203BT-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43309828636762,"sku":"BWCS-TCA203BT-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43309828669530,"sku":"BWCS-TCA203BT-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-TCA203BT-1.webp?v=1777868465","url":"https:\/\/batteryweb.com\/products\/technicolor-tca203-replacement-battery-37v-4500mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}