{"product_id":"microtalk-li3900-2-dx-14-mile-radio-replacement-battery-74v-700mah-li-ion","title":"microTALK LI3900-2 DX Compatible Battery 7.4V 700mAh BK-71216","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003emicroTALK LI3900-2 DX Series — 7.4V Li-ion Replacement Battery (BK-71216)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V 700mAh Li-ion pack replaces the BK-71216 battery across microTALK consumer two-way radios. It fits the LI3900-2 DX, LI5600-2 DX, LI6000-2 WX, LI6500-2 WX, and four additional models in the same family. Voltage, connector, and BMS communication match the OEM specification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eLI-series model compatibility:\u003c\/strong\u003e\n    The LI3900-2, LI5600-2, LI6000-2, and LI6500-2 all share the same 7.4V battery bay, contact layout, and BMS handshake protocol — that is why one pack number covers the entire range.\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 on the LI-series platform. The BMS held steady through repeated transmit current spikes without tripping into protection mode, and the charger dock accepted the pack without fault on first insertion.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion on the dock:\u003c\/strong\u003e\n    If the charger LED does not respond immediately, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The LI-series dock requires a clean contact cycle to complete the BMS handshake before charging begins.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the LI3900-2 cuts out mid-transmission on a new BK-71216\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA freshly shipped Li-ion cell sits at storage voltage — typically 3.6–3.7V per cell, not the 4.2V per cell full-charge level. When you press PTT, transmit current spikes sharply. If the pack voltage is already low, that spike can push the BMS into overcurrent protection and drop the connection. The radio is not faulty — the cell just needs a full charge cycle before it can sustain transmit loads. Charge completely before the first use in any RF application.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after fitting the new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe LI-series radios use a simple voltage-threshold system to display battery bars — each bar corresponds to a voltage window, not a measured capacity. A new cell at storage voltage will read one bar low until it reaches its first full charge. This is not a faulty pack or a mismatch. Charge the pack fully in the dock and the indicator will move to the correct level, typically at or above 8.2V resting.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426372485210,"sku":"BWCS-MCX700TW-1","price":27.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426372517978,"sku":"BWCS-MCX700TW-2","price":31.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426372550746,"sku":"BWCS-MCX700TW-3","price":34.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-MCX700TW-1.webp?v=1779931027","url":"https:\/\/batteryweb.com\/products\/microtalk-li3900-2-dx-14-mile-radio-replacement-battery-74v-700mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}