Bright Star LightHawk 07880 Replacement Battery 7.4V 10200mAh

Bright Star LightHawk — 7.4V Li-ion Replacement Battery (07880)

This is a 7.4V 10200mAh Li-ion battery for the Bright Star LightHawk series of handheld search and tactical flashlights. It fits the LightHawk 07802, 07815, and 07816 among others that share the 07880 battery platform. Swap it in when the original cell no longer holds charge or can't sustain full output brightness.

• LightHawk platform compatibility: These LightHawk models share a common 7.4V dual-cell battery bay, connector pinout, and BMS handshake protocol — which is why a single 07880 cell covers the whole range.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the LightHawk platform. The onboard BMS responded correctly at both ends — protection tripped at the expected low-voltage cutoff, and the charger handshake completed without faults.
• Multi-cell replacement rule: The 07880 uses a multi-cell configuration internally. If your light has more than one battery pack, replace all packs simultaneously from the same batch. Pairing a fresh cell with a degraded one causes the weaker cell to drain first, accelerating imbalance and risking damage under the high-current draw of turbo mode.

Battery draining faster in turbo mode than the indicator suggests

Turbo mode on the LightHawk pulls significantly more current than standard or medium output — often five to ten times as much. At that draw rate, cell voltage drops faster than the indicator circuit can track, because most indicators sample voltage under low load. The result is an apparent full charge that collapses quickly once turbo engages. If you need extended run time, step down to a lower output mode — the cell has the capacity, but turbo burns through it at a rate the indicator wasn't calibrated to display accurately.

LightHawk stepping down brightness before the battery indicator reaches low

This is the driver's brownout protection doing exactly what it should. When cell voltage under load drops below the driver's threshold — typically around 6.0V for a 7.4V pack — the driver steps output down to protect both the LED and the cell. The indicator reads resting voltage, not loaded voltage, so it may still show one or two bars when the step-down happens. If the light dims mid-use, switch to a lower mode immediately to stay above the cutoff threshold and recover usable output.