About this replacement
Hytera HP500 / HP560 Series — 7.7V Li-ion Replacement Battery (BL1508)
This 7.7V Li-ion battery replaces the OEM BL1508, BL2301-Ex, and BP3005 packs for the Hytera HP500, HP505, HP560, and HP565 portable digital radios. Capacity is 3200mAh (24.64Wh). The HP500 series is a DMR-tier professional radio used in public safety, security, and enterprise field operations.
- HP500 / HP505 / HP560 / HP565 platform fit: These four models share the same battery bay geometry, contact pin layout, and 7.7V BMS handshake requirement. One pack SKU covers the full set because the charging circuit and connector spec did not change across the HP500 generation.
- Bench tested on actual hardware: We cycled this pack in an HP560 and monitored BMS response across PTT transmit bursts. The BMS held the voltage rail steady through sustained DMR transmission without triggering overcurrent cutoff.
- First insertion into the Hytera dock: If the dock LED shows a fault on first seating, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The HP500-series charger requires a clean contact cycle to complete the BMS handshake before it will begin charging.
Why the HP500 drops to reduced TX power mid-shift on a new battery
New Li-ion cells ship at storage voltage — typically around 3.7–3.8V per cell, not full charge. The HP500 monitors the voltage rail and steps down RF output when it reads the pack as low. This is not a fault with the battery; it is the radio protecting its PA stage. Charge the pack fully in the Hytera dock before the first shift and the TX power will operate at its rated level.
Bar indicator shows one fewer bar than expected after fitting the BL1508
The HP500 uses voltage thresholds to drive its bar indicator — it reads pack voltage directly, not a charge percentage chip. A new pack at storage voltage sits below the top threshold, so the radio displays one or two bars even though the cell is not depleted. One full charge cycle brings the cell voltage up to 8.3–8.4V and the indicator will show full bars on the next power-on.