Yaesu VX-260 Replacement Battery 7.4V 2200mAh AAJ67X001

Yaesu VX-260 / EVX-530 Series — 7.4V Li-ion Replacement Battery (AAJ67X001)

This 7.4V 2200mAh Li-ion battery replaces the Yaesu AAJ67X001 in the VX-260, VX-261, EVX-530, and EVX-531 handheld transceivers. It slots into the same battery bay, uses the same contact layout, and matches the BMS handshake the charger dock expects. Capacity is 2200mAh (16.28Wh) — taken from the product specification, not estimated.

• VX-260 / EVX-530 platform fit: These models share the same battery form factor, contact strip spacing, and 7.4V nominal voltage rail. The BMS in each pack communicates cell state to the charger dock via the same three-contact interface, so one replacement part covers the whole platform without modification.
• Bench tested on actual hardware: We ran this pack through full charge and discharge cycles on a VX-261 and an EVX-530 dock. The BMS accepted the dock handshake on first insertion, held cutoff at the correct low-voltage threshold, and did not trip on PTT transmit current spikes.
• First insertion on a Yaesu dock: If the dock shows a fault LED on the first seating, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Yaesu charger platform requires a clean contact cycle to register the new BMS before the charge cycle starts.

Why the VX-260 drops to reduced TX power mid-shift on a fresh pack

The VX-260 monitors supply voltage continuously during transmit. When voltage sags below the radio's internal threshold under sustained RF output load, the firmware steps TX power down automatically to protect the PA stage. A new pack at storage voltage — typically around 3.7V per cell — has higher internal impedance than a fully conditioned cell, so the sag is steeper than expected. Charge the pack to full (8.4V at the pack terminals) before the first operational use. After two or three full cycles, cell impedance drops and the voltage sag under transmit load becomes shallow enough that the power step-down stops triggering.

Bar indicator showing one fewer bar than expected after fitting the AAJ67X001

The VX-260 uses voltage-threshold bar indicators — each bar corresponds to a fixed voltage band, not a fuel gauge calculation. A new Li-ion pack ships at storage voltage, not full charge, so the radio reads one or two bars even though the cell capacity is intact. This is not a faulty pack. Seat the battery in the charger dock and run a complete charge cycle until the dock LED goes green. Once the pack reaches 8.4V, the radio will display the correct bar count on power-up.