KAS160 Vodafone v1615 Replacement Battery 3.7V 1100mAh

Vodafone v1615 / VPA Compact V — 3.7V Li-Polymer Replacement Battery (KAS160)

This 3.7V, 1100mAh lithium-polymer cell replaces the original KAS160 battery in the Vodafone v1615 and VPA Compact V smartphones. It matches the original dimensions at 62.30 x 41.90 x 5.70mm, so it seats correctly in the battery bay without modification. Capacity is rated at 1100mAh (4.07Wh), identical to the factory specification.

• v1615 and VPA Compact V compatibility: Both devices share the same battery bay geometry, connector pinout, and BMS handshake protocol. The KAS160 part number covers both, and the same replacement cell works across the pair without any adapter or firmware difference.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the v1615 platform. The BMS accepted the cell without triggering a fault state, and the charge IC ramped current normally through CC and CV phases to full termination.
• Fuel gauge recalibration on first use: After fitting this cell, disable fast charging for the first complete discharge-charge cycle. The fuel gauge IC is calibrated to the old cell's discharge curve. One full cycle at standard current lets it recalibrate against the new cell before high-current charging is applied to an uncalibrated coulomb counter.

Why the v1615 reports wrong battery percentage after a cell swap

The fuel gauge IC on the v1615 builds its percentage model from the discharge curve of the old cell. When a new cell goes in, that stored curve no longer matches actual cell chemistry. The IC reports percentage from stale reference data until it sees a fresh full cycle. One complete discharge to auto-off followed by a full charge resets the coulomb counter reference and brings percentage reporting back into accuracy.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops sharply under modem or display load — the voltage cliff is steeper on a new cell with an uncalibrated fuel gauge. The OS sees a reported 25% but the actual cell voltage has already fallen below the 3.0V cutoff threshold under peak current draw. The BMS trips the output to protect the cell, and the phone shuts off hard. Run one full recalibration cycle as above; the fuel gauge will then place the low-voltage alarm at the correct percentage rather than too late in the discharge curve.