Albrecht AE105H Compatible Battery 4.8V 1200mAh Ni-MH

Albrecht AE105H / AE180H — 4.8V Ni-MH 1200mAh Replacement Battery

This is a 4.8V Ni-MH 1200mAh battery for the Albrecht AE105H and AE180H handheld two-way radios. It replaces the original pack when capacity has dropped or the battery no longer holds a charge between shifts. Capacity is 1200mAh at 5.76Wh — use the product data figure, not the label on the old pack.

• AE105H and AE180H compatibility: Both models share the same 4.8V four-cell Ni-MH pack format, connector pitch, and housing latch. A single replacement covers both platforms without modification.
• Bench tested on actual hardware: We ran this pack through a full charge cycle and confirmed the BMS handshake with the charger dock. Transmit current draw during PTT did not trigger overcurrent cutoff at standard RF output levels.
• 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. Ni-MH cells ship at storage voltage — the dock needs a clean contact cycle to begin the charge handshake.

Why the AE105H drops to reduced TX power mid-shift on a new pack

Ni-MH cells arrive from storage at roughly 50–60% state of charge, not full. Under sustained RF output, the radio's voltage threshold circuit reads the sag on partially charged cells and steps down transmit power to protect the finals. This is not a faulty battery — it is the radio responding to real voltage drop on an uncharged pack. Run the battery through two full charge-discharge cycles before field use and the voltage headroom recovers. After conditioning, the sag under PTT load drops significantly and TX power holds at the rated level.

Bar indicator showing fewer bars than expected after fitting the new battery

The AE105H uses a simple voltage-threshold bar indicator — each bar corresponds to a voltage band, not a percentage from a fuel gauge chip. A new Ni-MH pack at storage voltage will sit in the lower band and display one or two bars even though the cell capacity is intact. This is not a capacity defect. Charge the pack fully and the resting voltage climbs above the next threshold — the indicator will step up to the correct bar count. Expect the display to stabilise after the first complete charge cycle reaches 5.76V across the pack.