{"product_id":"vig-vr8810-replacement-battery-74v-2400mah-li-ion","title":"VIG VR8810 Two-Way Radio Replacement Battery 7.4V 2400mAh","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eVIG VR8810 — 7.4V Li-ion Replacement Battery\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis is a 7.4V, 2400mAh Li-ion battery for the VIG VR8810 two-way radio. It slots into the existing battery bay and connects to the radio's power rail using the original contact arrangement. No adapters or modifications are needed.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVR8810 fit:\u003c\/strong\u003e\n    The VR8810 runs a 7.4V nominal rail with a BMS handshake on insertion. This cell matches that voltage requirement and carries the protection circuit the radio expects before it allows power draw through the RF stage.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We cycled this pack through transmit loads on the bench. The BMS held the output voltage stable through repeated PTT events and did not trip on the current spike at key-up.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion on the dock:\u003c\/strong\u003e\n    If the charger dock shows a fault LED on first seating, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The VR8810 dock runs a contact-check cycle before it accepts the BMS handshake — a residue film on new cells is enough to block it.\u003c\/li\u003e\n  \u003c\/ul\u003e\n\n  \u003chr class=\"bpw-desc-divider\"\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eWhy the VR8810 drops to reduced TX power mid-shift on a new pack\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eA new cell ships at storage voltage — typically 3.7V per cell, around 7.4V combined — not at a full charge. The VR8810 monitors pack voltage continuously and steps down transmit power when the voltage reading falls below its RF output threshold. This is not a fault in the battery or the radio. A full charge cycle before field use brings both cells to 4.2V each and eliminates the mid-shift power step-down.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected after fitting this pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe VR8810 uses voltage-threshold bar indicators — each bar corresponds to a voltage band, not a percentage read from a chip. A pack at storage voltage sits in the lower band and displays fewer bars even though the cell is not depleted. Charge the pack fully before reading the indicator. After a complete charge cycle, the resting voltage should sit above 8.2V and the display will show the correct bar count.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426304655450,"sku":"BWCS-EXP800TW-1","price":43.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426304688218,"sku":"BWCS-EXP800TW-2","price":50.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426304720986,"sku":"BWCS-EXP800TW-3","price":55.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-EXP800TW-1.webp?v=1779930583","url":"https:\/\/batteryweb.com\/products\/vig-vr8810-replacement-battery-74v-2400mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}