{"product_id":"motorola-vx-261-replacement-battery-74v-2200mah-li-ion","title":"Motorola VX-261 Replacement Battery FNB-V133Li 7.4V","description":"\u003cdiv class=\"bpw-desc\"\u003e\n  \u003ch2 class=\"bpw-desc-h2\"\u003eMotorola VX-261 \/ VX-264 \/ VX-451 — 7.4V Li-ion Replacement Battery (FNB-V133Li)\u003c\/h2\u003e\n\n  \u003cp class=\"bpw-desc-lead\"\u003eThis 7.4V, 2200mAh Li-ion battery replaces the FNB-V133Li, FNB-V134Li, FNB-V138Li, AAJ67X001, AAJ68X001, and AAK66X501 packs. It fits the Motorola VX-261, VX-264, VX-451, and EVX-531 portable two-way radios. The pack slots into the standard battery bay and mates with the existing charger dock without modification.\u003c\/p\u003e\n\n  \u003cul class=\"bpw-desc-bullets\"\u003e\n    \u003cli\u003e\n\u003cstrong\u003eVX-261 \/ VX-264 \/ VX-451 \/ EVX-531 platform fit:\u003c\/strong\u003e\n    These models share a common 7.4V battery bay, connector pinout, and BMS handshake protocol. One pack covers the full group — no adapter or cable change needed.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eBench tested on actual hardware:\u003c\/strong\u003e\n    We ran this pack through a VX-261 charger dock and confirmed BMS communication, charge acceptance, and correct LED sequencing from fault-clear through to full-charge indication.\u003c\/li\u003e\n\n    \u003cli\u003e\n\u003cstrong\u003eFirst insertion on Vertex charger docks:\u003c\/strong\u003e\n    If the dock shows a fault LED on first seating, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Vertex 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\"\u003eWhy the VX-261 cuts out mid-transmission on a fresh battery\u003c\/h3\u003e\n\n  \u003cp class=\"bpw-desc-p\"\u003eWhen a new cell arrives at storage voltage — typically 3.7V to 3.8V per cell — the BMS may trigger an overcurrent trip the moment PTT is pressed. Transmit current on the VX-261 spikes sharply above the draw at standby, and the BMS treats that spike as a fault if cell voltage is below its operating window. The fix is to seat the battery in the charger dock and let it reach at least 7.2V before the first transmission. One full charge cycle clears this completely.\u003c\/p\u003e\n\n  \u003ch3 class=\"bpw-desc-h3\"\u003eBar indicator showing one fewer bar than expected on a new pack\u003c\/h3\u003e\n  \u003cp class=\"bpw-desc-p\"\u003eThe VX-series radio reads bars from voltage thresholds only — it has no fuel gauge chip. A new cell at storage voltage sits below the top threshold, so the radio displays one or two bars even though the pack is not depleted. This is not a faulty cell or a capacity issue. Charge the pack fully in the dock until the LED goes green, then power on the radio — the indicator will show the correct level at 8.2V to 8.4V full charge.\u003c\/p\u003e\n\u003c\/div\u003e","brand":"BatteryWeb","offers":[{"title":"Warranty 1 Year","offer_id":43426335096922,"sku":"BWCS-FVX261TW-1","price":42.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 2 Year","offer_id":43426335129690,"sku":"BWCS-FVX261TW-2","price":49.99,"currency_code":"USD","in_stock":true},{"title":"Warranty 3 Year","offer_id":43426335162458,"sku":"BWCS-FVX261TW-3","price":54.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0674\/4775\/0746\/files\/BW-CS-FVX261TW-1.webp?v=1779930721","url":"https:\/\/batteryweb.com\/products\/motorola-vx-261-replacement-battery-74v-2200mah-li-ion","provider":"BatteryWeb","version":"1.0","type":"link"}