{"product_id":"inrico-bs-81g-replacement-battery-385v-5900mah-li-ion","title":"B-81I Inrico BS-81G Replacement Battery 3.85V 5900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eInrico BS-81G — 3.85V Li-ion Replacement Battery (B-81I)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 3.85V, 5900mAh Li-ion battery replaces the B-81I pack in the Inrico BS-81G two-way radio. It fits the BS-81G directly and matches the original voltage rail and connector profile. The 22.72Wh capacity supports full-shift use by security, events, and emergency response crews.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eBS-81G platform fit:\u003c\/strong\u003e\n    The BS-81G runs a single-cell 3.85V architecture. This pack matches that rail exactly. The BMS communicates with the radio's charge management circuit using the same handshake protocol as the original B-81I, so the radio accepts the pack without throwing a fault state.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through transmit and standby loads on the BS-81G platform. The BMS handled PTT-triggered current spikes without tripping into overcurrent lockout. Charge termination was clean at full voltage with no false-positive fault signals from the dock.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion on the BS-81G charger dock:\u003c\/strong\u003e\n    If the dock LED shows a fault on first insertion, remove the pack and wipe the contact strip with a dry cloth before reseating. The BS-81G charger checks contact resistance before initiating the charge cycle — a single residue layer on the contacts is enough to trigger a rejection flag.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBS-81G bar indicator showing one fewer bar than expected on a new B-81I pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eThe BS-81G uses voltage thresholds to calculate the bar indicator — it does not read capacity directly. A new pack ships at storage voltage, typically around 3.6–3.7V, which sits below the top threshold for a full-bar reading. The radio correctly interprets this as not-full, because at that voltage it is not full. Run one complete charge cycle through the dock and the indicator will reflect the actual resting voltage of a fully charged cell, which sits at 4.2V for this chemistry.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBS-81G drops to reduced TX power mid-shift on a charged pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eSustained RF output draws significantly more current than standby, and if the pack's internal impedance is elevated, voltage sags under that load. The BS-81G responds to a voltage sag by stepping down transmit power to protect the circuit. This is not a faulty battery — it is the radio managing a real voltage drop. Check resting voltage after the radio cools; if it recovers above 3.7V, impedance is the cause. A full discharge and recharge cycle can reduce impedance slightly on a new pack in its first few cycles.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426174304346,"sku":"BWCS-NSR810TW-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426174337114,"sku":"BWCS-NSR810TW-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426174369882,"sku":"BWCS-NSR810TW-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-NSR810TW-1.webp?v=1779930458","url":"https:\/\/batteryweb.com\/products\/inrico-bs-81g-replacement-battery-385v-5900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}