Vodafone Smart II CAB6050001C2 Replacement Battery 3.7V 1100mAh

Vodafone Smart II / V860 — 3.7V Li-ion Replacement Battery (CAB6050001C2)

This is a 3.7V, 1100mAh Li-ion cell replacing OEM part CAB6050001C2 and CAB6050000C1 in the Vodafone Smart II and V860 smartphones. It fits the same battery bay and connector as the original. Capacity matches the factory spec at 4.07Wh.

• Smart II and V860 compatibility: Both models share the same chassis dimensions and battery connector, with identical voltage rails and BMS handshake requirements. One cell covers both variants without modification.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Smart II unit. The BMS accepted the cell without fault flags, and the charge IC stepped through trickle, CC, and CV phases correctly.
• Fuel gauge recalibration after swap: After fitting this cell, run one full discharge to auto-off followed by a complete uninterrupted charge before normal use. The Smart II's fuel gauge IC carries the old cell's discharge curve in memory — one full cycle overwrites it with accurate data for the new cell.

Why the Smart II shuts down suddenly at 20–30% after a cell swap

The Smart II's fuel gauge IC uses a stored discharge curve to predict remaining capacity. When a new cell goes in, that curve no longer matches the actual cell chemistry. Under modem or screen load, the phone pulls current that drops the real cell voltage below the BMS cutoff threshold — but the fuel gauge still reads 20–30% because it hasn't seen the new curve yet. The phone shuts off not because the cell is empty but because the voltage dropped below the safe floor under load. One full discharge-to-cutoff cycle followed by a full charge resets the coulomb counter and eliminates these early shutdowns.

Phone not powering on after the replacement cell sat in storage

Li-ion cells self-discharge in storage, and if the voltage drops below roughly 2.5V per cell, the BMS trips a lockout to prevent damage. A Smart II that won't power on after receiving a stored replacement cell is almost always in this state. Plug it into a wall charger — not a USB port — and leave it for 20–30 minutes before attempting to power on. The charger's trickle stage slowly raises cell voltage above the BMS recovery threshold, typically around 2.8–3.0V, at which point the lockout releases and the phone boots normally.