Uniden APH YV11C1-A Replacement Battery 10.8V 1200mAh

Uniden APH / APEX 500 Series — 10.8V Ni-MH Replacement Battery (YV11C1-A)

This is a 10.8V, 1200mAh Ni-MH replacement battery for the Uniden APH, APEX 500, APL, APU52D, and compatible handheld two-way radios. It replaces OEM part YV11C1-A and fits the same connector footprint as the original pack. Capacity is sourced from the product specification — 12.96Wh total.

• APH and APEX 500 platform fit: These models share the same 10.8V three-cell Ni-MH rail, connector pinout, and BMS handshake protocol — one pack covers the full APH, APL, and APU52D lineup without modification.
• Bench tested on actual hardware: We cycled this pack through transmit and standby loads on compatible Uniden hardware. The BMS handled PTT current draw without triggering overcurrent lockout across repeated key-up events.
• First insertion into the dock: If the charger shows a fault LED on first insertion, remove the pack, wipe the contact strip with a dry cloth, and reseat firmly — the Uniden dock requires a clean contact cycle to accept the BMS handshake before charge current begins.

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

A new Ni-MH pack ships at storage voltage — typically 1.0–1.1V per cell, which puts a three-cell pack around 3.0–3.3V below nominal. When PTT is pressed, the radio demands a sudden current spike for RF output. At storage voltage, internal cell impedance is higher than normal, and the voltage rail can sag far enough to trigger the radio's undervoltage protection and cut transmission. This is not a faulty pack. Run two full charge cycles before field use and the cell impedance drops to operating levels.

Bar indicator showing one fewer bar than expected after a full charge

Uniden handhelds use a simple voltage-threshold bar display — each bar corresponds to a voltage band across the 10.8V nominal range. A new Ni-MH pack can sit slightly below the top threshold immediately after its first charge cycle because cell chemistry hasn't fully equilibrated. Run the pack through one complete discharge and recharge cycle, and the resting voltage will stabilise within the correct top-bar threshold. If the indicator still reads low after two cycles, check that the dock contacts are clean and making full contact — a resistive connection causes the charger to terminate early, leaving the pack at 80–90% state of charge.