Alan PB-G8 Two-Way Radio Replacement Battery 4.8V 700mAh

Alan 5006 / 441 / 443 — 4.8V Ni-MH Replacement Battery (PB-G8)

This is a 4.8V, 700mAh Ni-MH replacement battery for the Alan 5006, 441, and 443 portable two-way radios. It replaces OEM part number PB-G8 directly. The pack slots into the same battery bay and uses the same contact layout as the original.

• Alan 5006, 441, and 443 compatibility: These three models share the same battery bay geometry, contact spacing, and 4.8V supply rail. One pack covers all three without adapter or modification.
• Bench tested on actual hardware: We ran this pack through full charge and discharge cycles on the Alan platform. The BMS held within expected voltage thresholds across transmit bursts and idle draw without tripping overcurrent protection.
• First-charge conditioning on Ni-MH packs: Ni-MH cells ship at partial charge and benefit from a full uninterrupted charge cycle before first use. Do not remove the pack mid-charge on the first cycle — interrupted charging on a fresh Ni-MH cell can cause voltage depression that reduces usable capacity from the start.

Why the Alan 5006 cuts out mid-transmission on a new PB-G8 pack

Ni-MH cells at storage voltage — typically around 1.1V per cell — can sag sharply under the current spike when PTT is pressed. The radio's low-voltage cutoff interprets this sag as a depleted pack and drops the transmitter. This is not a faulty battery. One full charge cycle brings each cell up to approximately 1.2–1.25V, which provides enough headroom to sustain transmit current without triggering cutoff.

Bar indicator stuck on one bar after fitting a new PB-G8

The Alan 5006 uses a voltage-threshold bar indicator — it reads pack voltage directly and maps it to bars. A new Ni-MH pack at storage voltage reads low on that scale, so the radio displays one bar even though the cells are not depleted. This is a voltage reading issue, not a cell fault. Charge the pack fully and allow it to rest for 15 minutes post-charge — the resting voltage should settle above 4.8V, and the indicator will display correctly.