About this replacement
Pelican 9410 / 9419 — 4.8V Ni-MH Replacement Battery (9410-301-000)
This is a 4.8V, 10000mAh Ni-MH battery pack replacing OEM part 9410-301-000 and 9413-301-000. It fits the Pelican 9410 and 9419 rechargeable tactical flashlights. Capacity figure is taken directly from product data — 48Wh total energy storage.
- 9410 and 9419 platform fit: Both lights share the same battery bay dimensions, connector pinout, and 4.8V supply rail. The driver circuitry in each model draws from a common cell architecture, so one pack covers both without modification.
- Bench tested on actual hardware: We cycled this pack through charge and discharge on the 9410 platform. The BMS accepted a full charge without fault flags, and output voltage held within spec across the driver's operating range under sustained high-current draw.
- Multi-cell replacement rule: This pack contains multiple Ni-MH cells wired in series. Never mix this new pack with leftover cells from the original battery. Mismatched cells cause the weaker cell to drain first under high-current draw — at turbo output levels, that imbalance can damage the weaker cell irreversibly.
Why the 9410 steps down output before the battery indicator reads low
The 9410's driver uses brownout protection — it monitors the voltage rail continuously, not just at the indicator threshold. Ni-MH cells drop voltage under load faster than the indicator circuit catches, especially in turbo mode. When the driver detects rail voltage falling below its trip point, it steps output down to protect the LED and driver components. This happens before the indicator LED changes state, so it can look like a fault when it is actually normal end-of-charge behaviour.
One cell in the pack draining faster than the rest
In a series Ni-MH pack, the weakest cell sets the limit for the entire pack. If one cell has higher internal resistance — from age, partial discharge, or a prior deep discharge — it gives up voltage first under load. The driver then trips brownout protection prematurely, cutting output even though the other cells still have charge remaining. Replace the entire pack as a unit and confirm the charger brings the pack to 5.76V–6.0V at full charge before reinstalling.