{"product_id":"kenwood-nx-240v-replacement-battery-74v-2000mah-li-ion","title":"KNB-84L Kenwood NX-240V Replacement Battery 7.4V 2000mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKenwood NX-240V \/ NX-340U \/ NX1200 Series — 7.4V Li-ion Replacement Battery (KNB-84L)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 2000mAh (14.8Wh) Li-ion replacement battery for the Kenwood NX-240V, NX-340U, NX1200, NX-1200A, and compatible NX-series portables. It uses the KNB-84L footprint with the same connector, latch geometry, and BMS communication protocol as the OEM pack. Voltage and capacity figures match the original Kenwood specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eNX-series platform fit:\u003c\/strong\u003e\n    The NX-240V, NX-340U, NX1200, and NX-1200A share the same 7.4V battery bay, physical latch, and BMS handshake protocol — which is why one pack covers all of them. The dock and radio firmware read pack voltage and BMS data through the same contact array across the whole family.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through full charge and simulated PTT transmit loads on the NX platform. The BMS handled the transmit current spike cleanly without tripping overcurrent protection, and the charger dock accepted the pack and progressed to ready status normally.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion on the KSC-35SK or KSC-43K dock:\u003c\/strong\u003e\n    If the dock fault LED stays on after inserting a fresh pack, remove the battery and wipe the gold contact strip with a dry cloth before reseating. The Kenwood dock requires a clean contact cycle to complete the BMS handshake — a residue film from factory storage is often enough to block it on the first attempt.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the NX-240V cuts out mid-transmission on a brand-new battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNew Li-ion cells ship at storage voltage — typically 3.6–3.7V per cell, giving roughly 7.2–7.4V at the pack terminals. When you key the PTT, transmit current can spike sharply for the first few seconds. If the pack hasn't completed a full charge cycle, the BMS may read that voltage dip as an undercurrent fault and cut output momentarily. The fix is straightforward: charge the pack fully on the KSC-35SK or KSC-43K before the first field use. A complete charge cycle brings each cell to 4.2V and allows the BMS to set its internal reference thresholds correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after swapping to the new KNB-84L\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe NX-series bar indicator reads pack voltage against fixed thresholds — it does not track charge history or cell chemistry. A new cell at storage voltage (around 7.2V) sits at or just below the threshold for the top bar, so the radio legitimately displays one fewer bar even with a fresh pack. This is not a fault with the battery. Charge the pack fully to 8.4V on the dock, then reinsert — the indicator will step up to full bars once the pack voltage clears the top threshold.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43291748335706,"sku":"BWCS-KNX120TW-1","price":50.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 2 Year","offer_id":43291748368474,"sku":"BWCS-KNX120TW-2","price":59.99,"currency_code":"USD","in_stock":false},{"title":"Warranty 3 Year","offer_id":43291748401242,"sku":"BWCS-KNX120TW-3","price":66.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KNX120TW_1.webp?v=1777520717","url":"https:\/\/batteryweb.com\/products\/kenwood-nx-240v-replacement-battery-74v-2000mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}