Sigor Nuindie Replacement Battery 3.7V 5200mAh 4508401

Sigor Nuindie / Numotion Series — 3.7V Li-ion Replacement Battery (4508401)

This 3.7V, 5200mAh Li-ion cell replaces the internal battery in the Sigor Nuindie, Nuindie Floor, Nuindie Mini, and Numotion portable LED desk lamps. It restores full cordless operation when the original cell has degraded or failed entirely. Capacity figure is 19.24Wh — use the product data, not third-party listings, for spec verification.

• Nuindie and Numotion platform fit: All four models share the same 3.7V single-cell architecture, identical connector pinout, and the same BMS handshake threshold. One cell fits the full lamp range without modification.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on a Nuindie unit. The BMS accepted the cell without fault codes, balanced correctly at top-of-charge, and held voltage within spec across brightness levels.
• UV mode and multi-mode draw calibration: If your Nuindie has a UV or colour-temperature mode, charge the lamp fully before switching between modes. UV draw is significantly higher than standard white light output, and a cell sitting at storage voltage will trigger a low-battery cutoff almost immediately after switching to UV mode.

Lamp not reaching rated brightness after battery swap

Replacement Li-ion cells ship at storage voltage — typically 3.6–3.65V — not full charge. The Nuindie's LED driver needs closer to 4.1–4.2V to push rated lumens at maximum brightness. If the lamp looks dimmer than expected straight out of the box, that is the cause. Charge fully before judging output — rated brightness returns once the cell hits 4.1V.

Nuindie flickering or cutting out before battery indicator reads empty

The LED driver in these lamps has a minimum input voltage threshold, typically around 3.5V. When the cell sags under load — especially at maximum brightness — voltage can briefly dip below that threshold even while the battery gauge still shows charge remaining. The driver drops out, causing a flicker or full shutoff. If this happens repeatedly, check that the cell contacts are clean and seated fully; a poor connection increases resistance and worsens voltage sag under draw.