{"product_id":"hytera-tc-610-replacement-battery-74v-2000mah-li-ion","title":"Hytera TC-610 Replacement Battery BL1204 7.4V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eHytera TC-610 \/ TC-620 Series — 7.4V Li-ion Replacement Battery (BL1204 \/ BL2001)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 2000mAh Li-ion replacement battery for the Hytera TC-610, TC-610P, TC-618, and TC-620 portable two-way radios. It uses OEM part numbers BL1204 and BL2001. The cell fits the standard battery bay on these handhelds and communicates with the radio's BMS over the same three-contact interface as the original pack.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTC-610 \/ TC-620 platform compatibility:\u003c\/strong\u003e\n    These four models share the same battery bay geometry, contact pinout, and 7.4V voltage rail. The BMS handshake protocol is identical across the range, so one pack covers all four without any hardware modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack on a TC-620 unit through full charge and discharge passes. The BMS held cutoff voltage at 6.0V on discharge and accepted charge current correctly at the dock without triggering fault indicators.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion into the charger dock:\u003c\/strong\u003e\n    If the dock LED blinks amber and does not transition to solid red on first insertion, remove the pack and wipe the gold contact strip with a dry cloth. The TC-610 series dock requires a clean contact cycle to complete the BMS handshake — a fingerprint or oxidation film on the contacts is enough to block it.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the TC-610 cuts out mid-transmission on a new BL1204 pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNew Li-ion cells ship at storage voltage — typically 3.7–3.8V per cell, which puts a fresh two-cell pack around 7.4–7.6V at rest. When PTT is pressed, transmit current spikes sharply, and the BMS interprets the voltage sag under that load as a low-cell condition. The radio drops out of transmit before the pack is anywhere near depleted. Running one full charge cycle before field use raises the cell voltage to 4.1–4.2V per cell, which gives the BMS enough headroom to pass the transmit current spike without tripping.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eTC-610 bar indicator shows one bar on a fully charged new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe TC-610 series reads remaining charge from cell voltage thresholds — not a fuel gauge chip. A pack that has just come off the charger for the first time may show one or two bars if the cells have not yet been cycled. The voltage-to-bar mapping recalibrates across the first two to three full charge and discharge cycles. After the second full cycle, resting cell voltage should read 8.3–8.4V across the pack terminals, and the bar indicator will track correctly from that point.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426189443162,"sku":"BWCS-HTC620TW-1","price":37.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426189475930,"sku":"BWCS-HTC620TW-2","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426189508698,"sku":"BWCS-HTC620TW-3","price":47.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/batteryweb.com\/products\/hytera-tc-610-replacement-battery-74v-2000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}