{"product_id":"icom-ic-31a-replacement-battery-74v-3300mah-li-ion","title":"Icom BP-271 Compatible Battery 7.4V 3300mAh Li-ion","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, 3300mAh Li-ion battery for the Icom IC-31A, IC-31E, IC-51A, and IC-51E handheld transceivers. These are compact VHF\/UHF two-way radios used in portable field and professional communications. The battery slots into the same dock position as the original BP-271 and BP-272Li packs.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eIC-31 and IC-51 platform fit:\u003c\/strong\u003e\n    Both series run the same 7.4V rail, use the same gold-contact connector, and share a BMS handshake protocol — one battery covers both. The BP-271 and BP-272Li OEM references both map to this cell configuration.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through full charge and PTT transmit loads on the IC-51 platform. The BMS handled the transmit current spike without tripping, and the dock accepted the pack on first insertion after a contact wipe.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion on the Icom dock:\u003c\/strong\u003e\n    If the charger dock shows a fault LED on first insertion, remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly. The Icom platform 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\"\u003eIC-31A \/ IC-51A bar indicator showing one fewer bar than expected on a new pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eNew Li-ion cells ship at storage voltage — typically around 3.7–3.8V per cell, which puts the pack near 7.5V total. The IC-31 and IC-51 voltage-threshold bar system reads this as one bar below full. The radio is not faulty and the battery is not defective. Run a full charge cycle first; once the pack reaches 8.4V, the bar indicator will read correctly.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eRadio cuts out mid-transmission on PTT press with new battery inserted\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003ePressing PTT draws a hard current spike as the RF stage ramps up — on the IC-51 platform this can exceed 1.5A for a brief moment. If the gold contact strip has residue or oxidation, that spike causes a voltage drop at the terminal that the BMS reads as an overcurrent event and trips. Remove the pack, clean all six contact points on both the battery and dock with a dry cloth, reseat the battery, and confirm the dock accepts it before transmitting again.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426191769690,"sku":"BWCS-ICM271TX-1","price":76.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426191802458,"sku":"BWCS-ICM271TX-2","price":91.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426191835226,"sku":"BWCS-ICM271TX-3","price":100.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-ICM271TX-1.webp?v=1779930437","url":"https:\/\/batteryweb.com\/products\/icom-ic-31a-replacement-battery-74v-3300mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}