Ceag HSE5 4.8V Replacement Battery 5000mAh Ni-CD

Ceag HSE5 / SEB8DIN Series — 4.8V Ni-CD Replacement Battery (31147000115)

This is a 4.8V, 5000mAh nickel-cadmium replacement battery for the Ceag HSE5 emergency flashlight. It fits the HSE5, HSE5ex, SEB8DIN, and SEB8LDIN models. The OEM part number is 31147000115 — verify this against your existing battery before ordering.

• HSE5 and SEB8DIN series compatibility: These four models share the same 4.8V cell configuration, connector pinout, and physical envelope. The SEB8DIN and SEB8LDIN are DIN-rail-mounted variants of the same emergency lighting platform — the battery pack is interchangeable across all four.
• Bench tested on actual hardware: We cycled this pack through charge and discharge under a load representative of emergency flashlight draw. The BMS accepted charge without fault flags and delivered consistent voltage across the full discharge curve without premature cutoff.
• Multi-cell replacement rule for the HSE5: The HSE5 runs a multi-cell pack. When one cell degrades, the others compensate — then fail faster. Replace the full pack rather than attempting single-cell substitution. Mixing a fresh pack with aged cells from a partially rebuilt unit creates immediate imbalance under high-current draw.

Ni-CD memory effect in infrequently tested emergency flashlights

Emergency flashlights in standby applications are often topped up before they fully discharge — this is where Ni-CD memory effect accumulates. Over time, the cells learn a shallower capacity ceiling and begin cutting off well above true depletion. The HSE5 will still show a charged state but deliver noticeably reduced output under load. Running a full discharge cycle before recharge can partially recover capacity, but a pack showing this pattern consistently needs replacement.

HSE5 flashlight dims suddenly without the battery indicator triggering

This happens when the pack voltage sags under load before the indicator threshold trips. The flashlight driver steps down output to protect the circuit — this is brownout protection, not a fault. The pack is depleted even though the indicator hasn't responded yet. Check open-circuit voltage: a healthy 4.8V Ni-CD pack should read 5.4–5.6V fully charged; anything below 4.6V at rest means the pack needs replacement.