Zafferano Pina Pro Replacement Battery 3.7V 2600mAh Li-ion

Zafferano Pina Pro / Poldina L Series — 3.7V Li-ion Replacement Battery (BAT04701906701900)

This is a 3.7V, 2600mAh Li-ion replacement cell for the Zafferano Pina Pro, Push Up, Home, and Poldina L cordless LED desk lamps. It slots into the lamp base and restores full wireless operation when the original cell has degraded or stopped holding charge. Capacity figures come from the product data sheet — 2600mAh / 9.62Wh.

• Pina Pro, Push Up, Home, and Poldina L compatibility: These four lamps share the same battery bay dimensions, connector pinout, and 3.7V nominal cell voltage. The LED driver circuit in each is tuned to this voltage rail, so swapping in a correctly rated cell restores full dimming range without triggering low-voltage shutoff prematurely.
• Bench tested on actual hardware: We cycled this cell through the full brightness range on the Pina Pro — from warm dim to maximum output. The BMS held stable input to the LED driver across all steps, and charge termination triggered cleanly at 4.2V with no overcharge excursion.
• First-use calibration on multi-mode lamps: Charge the lamp fully before switching between brightness modes for the first time. A cell shipped at storage voltage can read as low immediately after a high-draw mode activates — a full charge cycle lets the fuel gauge recalibrate to the actual cell capacity.

Why the Pina Pro dims suddenly at maximum brightness

Maximum brightness draws three to four times more current than the lowest warm dim setting. If the cell is partially depleted, that current spike causes voltage to sag below the LED driver's minimum input threshold. The driver responds by stepping the lamp down to a lower brightness tier — not a fault, just load management. A fully charged cell sustains the higher current draw without the sag, keeping the lamp at rated output.

Lamp flickers then cuts out on a replacement cell

Flickering followed by a hard cutoff usually means the BMS tripped on an overcurrent event, not a bad cell. This happens when a new cell at storage voltage — typically around 3.6V — is asked to power the lamp immediately before a full charge. The LED driver pulls peak current on startup, and a cold cell at partial state of charge hits the BMS current limit. Charge the battery to 4.2V first, then power on — startup current stays within the BMS window and the flicker stops.