Yaesu FNB-V130LI VX-351 Replacement Battery 7.4V 2600mAh

Yaesu VX-351 / VX-354 / VX-359 — 7.4V Li-ion Replacement Battery (FNB-V130LI)

This 7.4V 2600mAh Li-ion pack replaces the FNB-V130LI in the Yaesu VX-351, VX-354, and VX-359 handheld transceivers. These are compact land mobile radios used in field operations, emergency response, and professional communication work. Voltage and capacity match OEM spec exactly — no programming changes required.

• VX-351 / VX-354 / VX-359 platform fit: All three models share the same battery bay geometry, contact pin layout, and 7.4V power rail. The BMS handshake protocol is identical across the series, so one pack covers the full range without any firmware or adapter workaround.
• Bench tested on actual hardware: We ran this pack in a VX-351 under simulated PTT cycles. The BMS held steady through the transmit current spike at key-up and did not trip on repeated back-to-back transmissions. Charge acceptance on the standard Yaesu desk charger was normal from first insertion.
• First insertion into the charger dock: If the dock LED blinks a fault on first seating, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Yaesu platform requires a clean contact cycle to complete the BMS handshake before the charge cycle begins.

Why the VX-351 drops to reduced TX power mid-shift on a fresh pack

Under sustained RF output — long transmissions or rapid PTT cycling — the radio draws a short high-current burst that can cause voltage sag across the cell stack. If the BMS detects the pack voltage dipping toward its lower threshold, the radio's power management circuit steps down transmit power to protect the cells. This is not a faulty pack — it is the BMS doing its job. Let the pack rest for two to three minutes off-key and voltage recovers to normal operating level.

Bar indicator showing one fewer bar than expected on a new FNB-V130LI

New Li-ion cells ship at storage voltage — typically around 3.7V per cell, which reads as roughly 7.4V total. The VX-series bar indicator uses voltage thresholds, so a pack at storage voltage will display one bar below full. This is not a capacity fault. Seat the pack in the charger and run a full charge cycle to 8.4V before the first use — after that, the indicator will read correctly at all charge levels.