4-TD-800AA-HP Cooper Industries 6200-RP Compatible Battery 4.8V 1500mAh

Cooper Industries 6200-RP — 4.8V Ni-MH Replacement Battery (4-TD-800AA-HP)

This is a 4.8V 1500mAh Ni-MH replacement battery for the Cooper Industries 6200-RP emergency lighting unit. It slots directly into the fitting and connects to the onboard charge controller. Capacity is 1500mAh (7.2Wh), matching the original cell specification.

• 6200-RP compatibility: The 6200-RP uses a 4.8V NiMH cell pack with a specific connector orientation and physical footprint. This pack matches that voltage rail and physical format, so the charge controller sees the correct chemistry and applies the right float charge current without being forced into a mismatched charging profile.
• Bench tested on actual hardware: We ran this cell pack through a full charge cycle and a load test simulating emergency activation. The BMS accepted the cell, reached float without tripping a fault, and the pack sustained load without a premature cutoff event.
• First-cycle commissioning on the 6200-RP: After installation, hold the test button for the full rated duration within 24 hours. This lets the charge controller register the new cell capacity before the next scheduled compliance test — skipping this step often causes the first duration test to fall short of the rated period.

Charge indicator staying red after new battery installation in the 6200-RP

A new Ni-MH cell pack arrives from storage with a resting voltage that may sit outside the float acceptance window of the 6200-RP charge controller. When the controller reads that voltage, it treats the cell as a fault rather than a fresh charge cycle. This is not a wiring problem — it is the controller waiting for the cell voltage to climb into the expected range. Leave the fitting connected to mains for 24 hours. If the indicator has not moved to green after that period, check cell voltage directly with a multimeter — it should read above 4.6V before the controller transitions out of the red state.

Emergency light dims and loses brightness partway through a duration test

Dimming mid-test almost always means the cell was not fully charged before the test was triggered. A new Ni-MH pack needs at least one uninterrupted 24-hour charge on mains before it delivers full rated capacity under load. Triggering the test button the same day the battery is installed gives the cell no time to reach a full state of charge. Allow the full conditioning charge, then run the test — the pack should sustain lamp output at rated voltage through the complete test duration.