Yaesu AAJ67X001 VX-260 Replacement Battery 7.4V 2600mAh

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

This 7.4V 2600mAh Li-ion battery replaces the AAJ67X001 pack in Yaesu handheld radios. It fits the VX-260, VX-261, EVX-530, and EVX-531 portable transceivers. Same voltage, same connector, same BMS handshake as the factory pack.

• VX-260 / EVX-530 platform fit: These models share the same battery bay geometry, 7.4V power rail, and contact-pin layout. One pack covers both the amateur-band VX-261 and the business-band EVX-530 series because Yaesu standardised the battery interface across this chassis generation.
• Bench tested on actual hardware: We ran this pack through a full charge cycle and PTT transmit load on the EVX-530. The BMS held stable through the transmit current spike and released cleanly at end-of-charge — no fault flags on the dock.
• First-insertion contact cycle on the Yaesu dock: If the charger shows a fault LED on first seating, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Yaesu dock runs a BMS handshake on every insertion — a contaminated contact strip breaks that negotiation before charging starts.

Why the VX-260 cuts out mid-transmission on a freshly inserted pack

Pressing PTT on a VX-260 draws a sharp current spike — typically 1.5–2A above idle — as the PA stage ramps to full RF output. A new cell shipped at storage voltage (around 3.6–3.7V per cell) sits close to the BMS low-voltage trip threshold. If the internal impedance is slightly elevated from storage, that spike can momentarily drag the cell voltage below the cutoff point. The BMS interprets this as an unsafe draw and shuts the pack down before you finish the transmission. Run the pack through one full charge cycle before field use and the resting voltage moves to 4.1–4.2V per cell, giving the BMS adequate headroom to absorb the PTT spike without tripping.

Bar indicator reading one fewer bar than expected on a fully charged AAJ67X001

The VX-260 uses a voltage-threshold bar indicator — it maps specific resting voltages to bar counts, not a smart fuel gauge. A new pack fresh off the charger can read one bar low if the radio checks voltage before the cells have had a few minutes to settle after charge termination. Surface charge dissipates quickly and the resting voltage stabilises. Power the radio off for two to three minutes after removing it from the dock, then power back on — the bar count will reflect the true rested cell voltage, typically 8.3–8.4V across the pack.