GE 40070149 Flashlight Replacement Battery 6V 5000mAh Ni-MH

GE 40070149 / 41B038AF00101 — 6V Ni-MH Replacement Battery

This is a 6V 5000mAh Ni-MH replacement battery for GE flashlight models 40070149 and 41B038AF00101. It slots into the flashlight's battery compartment and restores full output to a torch that has lost capacity or stopped holding charge. Capacity is 5000mAh (30Wh) — taken from product data, not estimated.

• Fits both GE model numbers: Models 40070149 and 41B038AF00101 share the same battery compartment dimensions, voltage rail, and connector geometry. Both run a 6V cell stack, so the same pack works across either unit without modification.
• Bench tested on actual hardware: We cycled this pack through discharge and charge on the bench. The Ni-MH cells accepted a full charge without thermal runaway and held voltage through the discharge curve without early dropout at the driver's low-voltage cutoff threshold.
• Multi-cell replacement rule: This is a multi-cell pack. If the original pack had one cell that was weaker than the others, swapping in a fresh pack resets cell balance across the stack. Never mix cells from different manufacturing batches inside a single pack — the weaker cell takes a disproportionate load under high-current draw and degrades faster, pulling output voltage down early.

High-powered flashlight dimming before the battery indicator shows low

GE flashlights at this voltage use a driver circuit with brownout protection. When cell voltage sags under high-current draw, the driver steps output down before the indicator registers a low state — this is intentional, not a fault. It protects the cells from being pulled below the safe discharge floor. A fresh, fully charged Ni-MH pack at 6V nominal holds voltage higher through the draw curve and delays that step-down point. If the dimming happens immediately after a full charge, check that the pack reached a terminal charge voltage of approximately 7.2V before use.

Flashlight producing significantly shorter runtime in turbo mode vs. standard mode

Turbo mode on high-output flashlights draws current at 5–10 times the rate of standard mode. A 5000mAh Ni-MH pack has a fixed energy capacity — turbo simply depletes that capacity faster, which is physics, not a battery defect. Ni-MH cells also show steeper voltage sag at high discharge rates compared to lithium chemistries. If turbo runtime feels too short, switch to standard or mid mode for sustained use and reserve turbo for short bursts only.