{"product_id":"icom-ic-f52d-replacement-battery-74v-1900mah-li-ion","title":"Icom BP-290 Replacement Battery 7.4V 1900mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eIcom IC-F52D \/ IC-F62D \/ IC-M85 — 7.4V Li-ion Replacement Battery (BP-290 \/ BP-294)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 1900mAh Li-ion battery for the Icom IC-F52D, IC-F62D, and IC-M85 two-way radios. It replaces OEM part numbers BP-290 and BP-294. The battery fits the same connector and BMS handshake profile across all three models.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIC-F52D, IC-F62D, and IC-M85 platform:\u003c\/strong\u003e\n    All three radios share the same 7.4V battery bay, contact arrangement, and BMS communication protocol. One pack covers all three models without modification or adapters.\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 bursts on the IC-F52D. The BMS held stable through sustained RF output and correctly applied overcurrent cutoff at the expected threshold — no false trips during normal keying.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion into the dock:\u003c\/strong\u003e\n    If the charger shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Icom dock requires a clean contact cycle to accept the BMS handshake from a new pack 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\"\u003eIC-F52D bar indicator reading low on a freshly installed BP-290\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNew Li-ion cells ship at storage voltage — typically 3.6V to 3.7V per cell, which puts the pack around 7.2V to 7.4V at rest. The IC-F52D reads battery level using voltage thresholds, not a fuel gauge chip. At storage voltage, the radio may show one or two bars even on a brand-new pack. Run the pack through one full charge cycle in the dock first. After a full charge the resting voltage rises to approximately 8.3V–8.4V and the bar indicator reads correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRadio drops to reduced TX power mid-shift on the IC-M85\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe IC-M85 draws a sharp current spike — up to 2A or more — during transmit. On a cell with elevated internal impedance from age or deep discharge, this spike causes voltage to sag below the radio's power-management threshold. The radio responds by stepping down RF output to protect the circuit. This is not a firmware fault. If the pack recovers voltage within seconds of releasing PTT, the cell impedance is the cause — replace the pack and confirm charge voltage reaches 8.4V before the next shift.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426295677018,"sku":"BWCS-ICF250TW-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426295709786,"sku":"BWCS-ICF250TW-2","price":51.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426295742554,"sku":"BWCS-ICF250TW-3","price":56.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ICF250TW-1.webp?v=1779930584","url":"https:\/\/batteryweb.com\/products\/icom-ic-f52d-replacement-battery-74v-1900mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}