Hytera TC-700 Replacement Battery BL-2608 7.2V 2000mAh

Hytera TC-700 Series — 7.2V Ni-MH Replacement Battery (BL-2608)

This is a 7.2V, 2000mAh Ni-MH replacement for the Hytera BL-2608 battery pack. It fits the TC-700, TC-700U, TC-710, TC-780, and TC-780M portable two-way radios. Voltage and capacity match the original specification exactly.

• TC-700 series compatibility: The TC-700, TC-700U, TC-710, TC-780, and TC-780M share the same battery bay dimensions, contact pin layout, and 7.2V supply rail. One pack covers all five variants without modification.
• Bench tested on actual hardware: We cycled this pack under simulated PTT load on the TC-700 platform. The BMS handled transmit current spikes without tripping into overcurrent lockout, and the charger dock accepted the handshake on first insertion after a clean contact cycle.
• Dock insertion on first use: If your TC-700 charger dock shows a fault LED on the first insertion, remove the pack, wipe the gold contact strip with a dry cloth, and reseat firmly. The Hytera dock requires a clean contact cycle to register the new pack before the charge cycle begins.

Why the TC-700 cuts out mid-transmission on a freshly inserted pack

Ni-MH cells ship at storage voltage — typically 1.1–1.15V per cell, putting the full pack around 6.6–6.9V. The TC-700's BMS monitors supply voltage during the transmit current spike. If the pack hasn't completed at least one charge cycle, voltage sag under PTT load can drop below the radio's cutoff threshold and trigger a mid-transmission shutoff. This is not a fault with the pack — it's the BMS responding correctly to an under-voltage condition. Charge the pack to full before the first field shift; dock voltage at full charge should read 8.4–8.6V across the terminals.

Bar indicator showing one fewer bar than expected after a pack swap

The TC-700 uses a simple voltage-threshold bar indicator — each bar corresponds to a voltage window, not a calculated charge percentage. A new Ni-MH pack fresh off the charger sits at surface charge voltage, which drops to its nominal resting level within the first few minutes of use. That drop can shift the indicator down by one bar before stabilising. If the indicator holds steady after that initial drop and the radio transmits normally, the pack is fine. Verify dock output is delivering a full charge cycle — target terminal voltage at end of charge is 8.4–8.6V.