{"product_id":"kenwood-tk-3130-replacement-battery-36v-1100mah-ni-mh","title":"Kenwood KNB-27N TK-3130 Replacement Battery 3.6V 1100mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eKenwood TK-3130 \/ TK-3131 — 3.6V Ni-MH Replacement Battery (KNB-27N)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 3.6V, 1100mAh Ni-MH replacement battery for the Kenwood TK-3130 and TK-3131 portable two-way radios. It matches the OEM KNB-27N and KNB-27 part numbers and fits the original battery slot without modification. Voltage and physical dimensions are held to OEM spec so the radio's charging circuit accepts it normally.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eTK-3130 and TK-3131 platform fit:\u003c\/strong\u003e\n    Both models share the same battery bay dimensions, contact layout, and 3.6V supply rail. One battery pack covers both radios — no adapter or wiring change needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through repeated PTT transmit loads on the TK-3130 platform. The BMS held cutoff voltage steady under the transmit current spike and recovered cleanly each time PTT was released.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion into the charger dock:\u003c\/strong\u003e\n    If the dock shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Kenwood charger platform requires a clean contact cycle to accept the new BMS handshake before it begins charging.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the TK-3130 cuts out mid-transmission on a fresh battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003ePressing PTT on the TK-3130 draws a sharp current spike as the RF stage ramps up. A new Ni-MH cell shipped at storage voltage — typically around 3.4V — sits close to the radio's low-voltage cutoff threshold. When the transmit surge hits, the pack voltage dips briefly below that threshold and the radio drops the transmission to protect itself. This is not a faulty battery. One or two full charge cycles bring the cell voltage up to its working range of 3.6V, and the cutoff trips stop.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after a full charge\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe TK-3130 uses simple voltage-threshold steps to drive the bar indicator — it reads pack voltage against fixed reference points, not capacity. A new Ni-MH cell that has not yet been fully conditioned will rest slightly below its rated open-circuit voltage even after a charge cycle completes. That lower resting voltage maps to one bar fewer on the display. Run two full charge-discharge cycles and the resting voltage will stabilise at the correct level. Check the open-circuit voltage at the pack contacts — it should read 3.7V or above after a complete charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426341617754,"sku":"BWCS-KNB270TW-1","price":28.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426341650522,"sku":"BWCS-KNB270TW-2","price":32.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426341683290,"sku":"BWCS-KNB270TW-3","price":35.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-KNB270TW-1.webp?v=1779930783","url":"https:\/\/batteryweb.com\/products\/kenwood-tk-3130-replacement-battery-36v-1100mah-ni-mh","provider":"BatteryWeb","version":"1.0","type":"link"}