{"product_id":"icom-ic-31a-replacement-battery-74v-1880mah-li-ion","title":"Icom BP-271 IC-31A Replacement Battery 7.4V 1880mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eIcom IC-31A \/ IC-51A Series — 7.4V Li-ion Replacement Battery (BP-271 \/ BP-272Li)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 1880mAh Li-ion battery pack for the Icom IC-31A, IC-31E, IC-51A, and IC-51E hand-held VHF transceivers. It replaces OEM part numbers BP-271 and BP-272Li. The pack slots into the standard Icom battery bay and connects through the same gold contact strip as the original.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIC-31A, IC-31E, IC-51A, IC-51E compatibility:\u003c\/strong\u003e\n    These four models share the same battery bay geometry, contact layout, and BMS handshake protocol. Icom kept the connector and voltage rail consistent across the A and E variants, so one pack covers both regional versions without any modification.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through a full charge cycle and PTT transmit loads on the IC-51A. The BMS handled the transmit current spike without tripping, and the charger dock moved through its charge stages correctly from the first insertion.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion contact cycle:\u003c\/strong\u003e\n    If the charger dock 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 new BMS handshake before it will begin charging.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eIC-31A charger dock fault LED after BP-271 swap\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eA new BP-271 pack ships at storage voltage — typically around 3.7V per cell, which sits below the dock's acceptance threshold. Some Icom charger docks interpret this as a fault condition and flash the LED rather than entering charge mode. This is a BMS handshake issue, not a defective pack. Wipe the contacts, reseat the battery, and if the LED persists, remove the pack for 30 seconds before reinserting to force the dock to re-poll the BMS.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected on a new BP-271\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe IC-31A and IC-51A use a voltage-threshold bar indicator — each bar corresponds to a voltage band, not a calculated charge state. A new pack at storage voltage will sit in a lower band and display fewer bars than a fully charged cell. This is not a capacity fault. Run a full charge cycle in the dock until the indicator goes green, then check the bar display again — it will read correctly once the cells are at 8.4V.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426307670106,"sku":"BWCS-ICM271TW-1","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426307702874,"sku":"BWCS-ICM271TW-2","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426307735642,"sku":"BWCS-ICM271TW-3","price":54.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ICM271TW-1.webp?v=1779930584","url":"https:\/\/batteryweb.com\/products\/icom-ic-31a-replacement-battery-74v-1880mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}