Peli 8050 M11 Replacement Battery 4.8V 4600mAh Ni-MH

Peli 8050 M11 / 8060 LED — 4.8V Ni-MH Replacement Battery

This is a 4.8V, 4600mAh Ni-MH battery pack built as a direct replacement for the Peli 8050 M11 and 8060 LED flashlights. These are high-output professional torches used in law enforcement, military, and emergency response. The pack matches the original voltage, cell count, and form factor so the flashlight driver sees no difference at startup.

• 8050 M11 and 8060 LED compatibility: Both lights run the same 4.8V four-cell Ni-MH pack on the same connector and share identical driver voltage requirements. One replacement covers both models without any modification.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on the 8050 M11 driver. The driver stepped down output cleanly at the expected low-voltage threshold, and the BMS held stable current delivery across all output modes without dropout.
• Multi-cell replacement rule: This pack contains four cells wired in series. Never mix this new pack with any remaining old cells from the original assembly. A weaker cell in a series string drains first, reverses polarity under high-current draw, and degrades permanently within a few cycles.

Flashlight driver stepping down output before the indicator hits low

The 8050 M11 driver monitors pack voltage in real time, not just state-of-charge percentage. As cell voltage drops under load, the driver reduces current to the LED before the battery indicator registers low — this protects the cells from damage under high-draw conditions. It is not a fault; it is brownout protection working correctly. A worn pack will trigger this step-down earlier in the discharge cycle than a fresh one.

One cell draining faster than the rest in a multi-cell pack

In a four-cell series string, any cell with lower capacity than the others hits cutoff voltage first. The driver sees the overall pack voltage drop and shuts down, leaving charge in the remaining three cells. Over time, repeated deep discharge of that single weak cell causes polarity reversal, permanently destroying it. Replace the full pack as a unit and check that the charger reads a full pack voltage of 5.6–6.0V at charge completion.