Sportcat BP120 Replacement Battery 4.8V 1200mAh

Sportcat SC140 / SC150 Series — 4.8V Ni-MH Replacement Battery (BP120)

This 4.8V, 1200mAh Ni-MH battery replaces the BP120, BP150, BP180, and BP250 packs used in Sportcat SC140, SC140B, SC150, and SC150B two-way radios. It fits the original battery compartment and connector without modification. Capacity is drawn from product data — 1200mAh, 5.76Wh.

• SC140 and SC150 platform fit: These models share the same 4.8V cell configuration, connector pinout, and physical form factor across the SC140, SC140B, SC150, and SC150B variants — that is why one pack covers all four. The BMS handshake threshold is identical across the range.
• Bench tested on actual hardware: We ran this pack through charge and transmit cycles on the SC150 dock. The BMS handled the PTT current spike cleanly and the cell voltage held stable under sustained RF output without triggering overcurrent cutoff.
• First insertion on the SC140 dock: If the dock shows a fault LED on first insertion, remove the pack and wipe the gold contact strip with a dry cloth before reseating. The SC140 charger requires a clean contact cycle to accept the BMS handshake before charging begins.

SC140 bar indicator showing fewer bars than expected on a new BP120

New Ni-MH cells ship at storage voltage — typically around 1.1V to 1.15V per cell — which sits below the SC140's upper bar threshold. The radio reads this as a partially depleted pack even though the cells are unused. This is a voltage-threshold display issue, not a fault with the battery. Run a full charge cycle first; the bar indicator will reflect actual cell voltage once charge is complete.

SC150 cuts out mid-transmission on a new pack after extended shelf storage

If a replacement pack has been stored for several months before use, the cell voltage can drop below the BMS recovery threshold — typically under 4.0V for a 4.8V four-cell Ni-MH pack. Pressing PTT draws a sharp current spike that the BMS cannot sustain at that depleted voltage, so it trips the overcurrent cutoff and the radio drops out. Place the pack in the dock for a full charge before first use in the field. Once cell voltage climbs above 4.4V, the BMS will handle transmit surges normally.