Zafferano Poldina Replacement Battery 3.7V 5200mAh Li-ion

Zafferano Poldina / Olivia / Ofelia / Dama — 3.7V Li-ion Replacement Battery (BAT0470370670190)

This 3.7V, 5200mAh Li-ion cell replaces the internal battery in the Zafferano Poldina, Olivia, Ofelia, and Dama portable LED desk lamps. These lamps are cordless by design, so when the original cell degrades, the lamp either dims early, flickers, or stops holding charge altogether. Swapping this cell restores full wireless operation.

• Poldina family platform: The Poldina, Olivia, Ofelia, and Dama share the same internal battery bay dimensions and voltage rail. Zafferano uses a consistent 3.7V single-cell architecture across this lamp family, which is why one cell covers all four models. The BMS communication protocol and charge termination voltage are identical across the range.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on a Poldina unit. The BMS accepted charge correctly, balanced to 4.2V at termination, and held voltage under both low-brightness and full-brightness LED driver loads without triggering protective cutoff.
• Brightness mode and current draw: The Poldina's touch dimmer steps through multiple brightness levels. Maximum brightness draws significantly more current than warm or mid-range settings. After fitting a new cell, run a full charge cycle before switching to maximum brightness — an uncalibrated cell at storage voltage can trigger the low-battery cutoff almost immediately at full draw.

Why the Poldina dims and shuts off before the indicator shows low battery

The Poldina's LED driver has a minimum input voltage threshold — typically around 3.0V for a single Li-ion cell. When the cell voltage sags under load, especially at full brightness, the driver drops out even if the battery indicator still shows partial charge. This is a load-voltage issue, not a gauge error. An aged cell with high internal resistance will sag further and faster than a fresh cell, causing premature shutoff. Fitting a new cell with lower internal resistance restores the voltage headroom the driver needs to stay on.

Lamp charges but returns to zero within minutes of unplugging

This symptom usually means the original cell has lost most of its usable capacity through deep-cycle degradation — the cell accepts charge but can no longer hold it under any real load. It is not a charger fault or a lamp fault. Confirm by charging fully and measuring open-circuit voltage at the battery terminals: a healthy cell reads 4.15–4.20V; anything below 3.8V after a full charge cycle indicates a spent cell. Replacing the cell is the only fix.