About this replacement
Hytera BP510 Series — 7.4V Li-ion Replacement Battery (BL1507)
This is a 7.4V, 1350mAh Li-ion replacement battery for the Hytera BP510 series portable two-way radio. It fits the BP510, BP515, BP560, and BP568 among compatible models. The BL1507 part number matches the OEM specification for voltage rail and connector format.
- BP510 / BP515 / BP560 / BP568 platform fit: These models share the same battery bay dimensions, contact pin layout, and BMS handshake protocol — one pack covers the group without modification or adapter.
- Bench tested on actual hardware: We cycled this pack through transmit load on a BP510 body. The BMS held the voltage rail stable through repeated PTT events and did not trigger overcurrent cutoff under normal keying patterns.
- Contact strip seating on first charge: If the charger dock shows a fault LED on first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The BP510 dock requires a clean contact cycle to complete the BMS handshake before charging begins.
Why the BP510 cuts out mid-transmission on a freshly inserted BL1507
A new Li-ion pack ships at storage voltage — typically around 3.6–3.7V per cell, not full charge. When the BP510 keys up for transmit, the RF output draws a spike of current that can momentarily pull the cell voltage below the BMS cutoff threshold. The radio drops transmission, and the user sees a low-battery indicator even though the pack is new. Charge the pack fully before first use — the dock green light confirms the cells are at 4.2V per cell and the BMS is ready for transmit load.
Bar indicator showing one fewer bar than expected after a full charge cycle
The BP510 uses a voltage-threshold bar indicator — it reads the pack voltage at rest and maps it to a bar level. A new cell can carry a small surface charge that drops within the first few minutes of radio operation, shifting the bar count down by one. This is not a fault with the pack. Run one full transmit session, let the dock complete a full charge cycle again, and the indicator will stabilise at the correct bar level for the actual state of charge.