Hytera BP4501 PNC460 Replacement Battery 3.85V 4500mAh

Hytera PNC460 / PNC460U — 3.85V Li-ion Replacement Battery (BP4501)

The BP4501 is a 3.85V, 4500mAh Li-ion battery for the Hytera PNC460 and PNC460U portable digital radios. These are professional-grade land mobile radios used in security, transportation, and emergency services — high-demand environments where a degraded cell is not an option. This battery matches the OEM voltage and connector spec exactly.

• PNC460 and PNC460U platform fit: Both the PNC460 and PNC460U share the same battery bay geometry, contact pin layout, and BMS handshake protocol — one battery serves both variants without any adapter or modification.
• Bench tested on actual hardware: We ran this pack through insertion, charge acceptance, and transmit-load cycles on the PNC460 platform. The BMS communicated correctly with the charger dock and the radio accepted full TX power without tripping overcurrent protection.
• First-insertion contact check: If the charger dock shows a fault LED on first insertion, remove the battery, wipe the gold contact strip with a dry cloth, and reseat firmly. The PNC460 platform requires a clean contact cycle to complete the BMS handshake before it begins charging.

Why the PNC460 drops to reduced TX power mid-shift on a new BP4501

New Li-ion cells ship at storage voltage — typically around 3.6–3.7V — not at full charge. When the radio draws transmit current from a cell at storage voltage, the internal resistance causes a voltage sag that the radio's power management reads as a low-battery condition. The radio responds by stepping down RF output power before the pack is actually depleted. A full charge cycle before the first shift brings the cell to its rated 3.85V nominal and eliminates this behaviour entirely.

Bar indicator showing one fewer bar than expected after fitting the BP4501

The PNC460 uses a voltage-threshold bar indicator — it reads the pack's resting voltage and maps it to a bar count. A new battery fresh from storage sits below the fully-charged voltage threshold, so the radio displays one bar fewer than a fully topped cell. This is not a fault with the battery or the radio. Charge the BP4501 to completion in the dock, then reinsert it — the indicator will reflect the correct charge state at 3.85V.