Brondi Amico 2 Compatible Battery 3.7V 1200mAh Li-ion

Brondi Amico 2 Series — 3.7V Li-ion Replacement Battery

This is a 3.7V 1200mAh Li-ion cell for Brondi candybar and flip phones in the Amico range. It fits the Amico 2, Amico 2 Diamond, Amico Elegant 2, Amico Flip 2, and 23 additional variants. Dimensions are 53.00 × 33.90 × 5.70mm — measure your original before fitting if you're unsure of your exact model.

• Amico family fit: These models share the same battery bay dimensions, 3.7V nominal rail, and contact arrangement. A single cell covers the full Amico 2 lineup without modification.
• Bench tested on actual hardware: We cycled the cell through full discharge and charge on a representative Amico handset. The protection circuit engaged correctly at both low-voltage cutoff and charge termination. No anomalous heat events were recorded.
• Fuel gauge recalibration on first use: After fitting, run the phone down until it powers off automatically, then charge uninterrupted to 100% before use. The fuel gauge IC in these handsets calibrates against the cell's actual discharge curve on the first full cycle — skipping this step causes erratic percentage readings from day one.

Why the Amico 2 reports wrong battery percentage after a cell swap

The Amico 2 uses a coulomb-counter fuel gauge IC that builds its capacity model from the very first discharge curve it records on a new cell. When you swap the battery, that stored model no longer matches the new cell's actual voltage-to-capacity relationship. The gauge then reports percentages based on old data, so the number on screen and the real charge state drift apart quickly. One complete discharge-to-shutdown followed by a full uninterrupted charge resets the calibration. After that cycle, percentage accuracy returns to normal.

Sudden shutdown at 20–30% on the Amico Flip 2 and Elegant 2

This happens when the cell voltage collapses under load before the fuel gauge expects it. On these models, the modem transmit burst draws a short high-current spike — if the cell's internal resistance is even slightly elevated, terminal voltage drops below the protection circuit's cutoff threshold while the gauge still shows 20–30% remaining. The phone cuts out to protect the cell, not because charge is truly gone. Let the phone cool for two minutes, power it back on, and charge immediately. If shutdown keeps occurring at the same percentage, do one full recalibration cycle as described above and check that the battery contacts are clean and seated flat.