Hytera BP4901 PNC560 Replacement Battery 3.85V 4800mAh

Hytera PNC560 — 3.85V Li-ion Replacement Battery (BP4901)

The BP4901 is a 3.85V Li-ion battery rated at 4800mAh (18.48Wh), built to fit the Hytera PNC560 portable two-way radio. The PNC560 is used in security, public safety, and enterprise environments where radio downtime is not an option. Swapping a degraded pack for this unit restores full transmit power and extends shift coverage without returning to a charger.

• PNC560 platform fit: The PNC560 uses a slim-format cell stack with a specific BMS handshake tied to the 3.85V nominal rail. This pack matches that voltage rail and connector pinout, so the radio's protection circuit accepts it on first insertion without throwing a fault condition.
• Bench tested on actual hardware: We cycled this pack through PTT-heavy transmit loads to confirm the BMS handles the current spike without tripping into overcurrent lockout. Cell voltage held stable across repeated keying events, and the dock accepted the pack without fault LED activation.
• First insertion contact check: If the charger dock shows a fault LED on first seating, remove the BP4901, wipe the gold contact strip with a dry cloth, and reseat firmly. The PNC560 dock requires a clean contact cycle to register the new BMS handshake before it begins the charge sequence.

PNC560 bar indicator reading low on a fresh BP4901

New Li-ion cells ship at storage voltage — typically around 3.6–3.7V — not at full charge. The PNC560 reads battery level using voltage thresholds, so a pack straight out of the box will often show one or two bars below full. This is normal cell state, not a fault. Run one full charge cycle in the dock before drawing conclusions about capacity.

PNC560 dropping to reduced TX power mid-shift on a new pack

Sustained RF output draws significantly more current than standby or receive modes. If cell impedance is even slightly elevated — common in packs that sat in a warehouse — voltage sags under load and the radio's protection logic steps down transmit power to protect the circuit. A full charge-discharge cycle lowers effective impedance. If the drop persists after two full cycles, check resting voltage after a 30-minute charge: it should read at or above 3.85V.