Zafferano Dama Replacement Battery 3.7V 5200mAh Li-ion

Zafferano Dama / Dama Pro / Ofelia / Ofelia Pro — 3.7V Li-ion Replacement Battery

This 3.7V 5200mAh (19.24Wh) lithium-ion cell replaces the internal rechargeable battery in Zafferano portable LED desk lamps including the Dama, Dama Pro, Ofelia, and Ofelia Pro. When the original cell degrades after repeated charge cycles, brightness drops and runtime shortens — this replacement restores the lamp to its original operating spec. Voltage and footprint match the factory cell at 65.50 × 37.00 × 19.50mm.

• Dama, Dama Pro, Ofelia, Ofelia Pro — shared battery platform: These Zafferano models run the same 3.7V cell architecture and LED driver circuit. The BMS threshold, connector type, and physical dimensions are consistent across the range, so a single cell spec covers all listed models without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a Zafferano-compatible LED driver rig. The BMS handled low-voltage cutoff cleanly and accepted a full charge without thermal events or balancing errors.
• First-use charge for Zafferano lamps: Charge the lamp fully before switching it on for the first time. Zafferano lamps with a colour-temperature or UV mode draw significantly more current in those modes — a cell at storage voltage will trigger a low-battery cutoff almost immediately when those modes are first activated.

Lamp not reaching rated brightness on a new battery

A freshly shipped lithium-ion cell sits at storage voltage — typically 3.6V to 3.65V — not full charge. Zafferano's LED driver requires voltage closer to 4.1V to push the LED array to rated lumen output. If the lamp looks dim straight out of the box, that is not a fault. Charge to 100% first, then test brightness — the lamp should reach full output at 4.1–4.2V cell voltage.

Lamp flickering or cutting out before the battery indicator hits zero

Flickering in Zafferano lamps usually means the LED driver is losing stable input voltage — not that the battery is empty. At higher brightness settings, current draw spikes and a degraded or partially charged cell sags below the driver's minimum input threshold, causing the flicker or sudden shutoff. This can also happen if the USB charging cable is underpowered — the lamp attempts to draw charging current and operating current simultaneously, starving the driver. Use a 5V 2A or higher USB source and charge the cell fully before extended use at maximum brightness.