{"product_id":"eads-cassidian-th1n-replacement-battery-37v-3150mah-li-polymer","title":"Cassidian TH1N Replacement Battery 3.7V 3150mAh BLN-10","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eEADS Cassidian TH1N — 3.7V Li-Polymer Replacement Battery (BLN-10)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.7V 3150mAh lithium-polymer battery replaces the BLN-10, BLN-11, and HT9980AA packs in the Cassidian TH1N handheld transceiver. The TH1N is a compact land mobile radio used by professional and emergency services personnel. Voltage and capacity match the original spec exactly — no modification needed.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTH1N platform fit:\u003c\/strong\u003e\n    The Cassidian TH1N uses a dedicated Li-Polymer pack with a specific connector pitch and BMS handshake sequence. All three OEM part numbers — BLN-10, BLN-11, and HT9980AA — share the same voltage rail and physical form factor, which is why this single replacement covers all variants.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through PTT transmit loads to confirm BMS behaviour under the current spike that occurs each time the radio keys up. The protection circuit held within spec and the dock accepted the pack after a standard contact seating cycle.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion into the charger dock:\u003c\/strong\u003e\n    If the dock LED shows a fault on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The TH1N charging dock requires a clean contact cycle to complete the BMS handshake before charging begins — this is not a battery fault.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the TH1N cuts out mid-transmission on a freshly inserted pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eEvery PTT press on the TH1N draws a sharp current spike as the RF stage powers up for transmission. If the BMS sees that spike against a cell sitting at storage voltage — typically around 3.6V to 3.75V — it can trip the overcurrent threshold and cut output before the transmission completes. This is a BMS protection event, not a cell failure. Running two or three short transmissions in succession allows the BMS to confirm stable current delivery and the cutouts stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected on a new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe TH1N reads battery level using a voltage-threshold bar indicator — it samples cell voltage and maps it to a bar count. A new pack shipped at storage voltage sits below the threshold for a full bar reading, so the radio shows one bar fewer than capacity actually warrants. This is not a fault. Seat the pack in the dock, run a full charge cycle to 4.2V, and the bar indicator will read correctly from that point forward.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426209366106,"sku":"BWCS-ETH110TW-1","price":71.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426209398874,"sku":"BWCS-ETH110TW-2","price":85.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426209431642,"sku":"BWCS-ETH110TW-3","price":94.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ETH110TW_1.webp?v=1779930436","url":"https:\/\/batteryweb.com\/products\/eads-cassidian-th1n-replacement-battery-37v-3150mah-li-polymer","provider":"BatteryWeb","version":"1.0","type":"link"}