Orange SPV PC26A Replacement Battery 3.7V 1150mAh Li-ion

Orange SPV / SPV C100 — 3.7V Li-ion Replacement Battery (PC26A)

This is a 3.7V Li-ion cell rated at 1150mAh (4.26Wh), built to the PC26A spec. It fits the Orange SPV and SPV C100 — Windows Mobile smartphones from the mid-2000s. If your original battery no longer holds a charge or the phone shuts down unexpectedly, this cell restores full operation.

• SPV and SPV C100 compatibility: Both models share the same battery bay geometry, connector pinout, and 3.7V nominal voltage rail. The PC26A part number covers both variants — no adapter or modification needed.
• Bench tested on actual hardware: We ran the cell through a full charge cycle and monitored BMS cutoff behaviour at both the high-voltage ceiling and the low-voltage floor. The protection circuit tripped cleanly at the expected thresholds with no thermal event.
• Fuel gauge recalibration on first use: After fitting this cell, run one complete discharge down to automatic shutdown, then charge uninterrupted to 100% before normal use. The SPV's fuel gauge IC was calibrated to your old cell's discharge curve — this single cycle resets it against the new cell so percentage readings stay accurate.

Sudden shutdown at 20–30% on the Orange SPV after a cell swap

The SPV's fuel gauge IC stores a discharge curve from the previous cell. A fresh Li-ion cell has a steeper voltage slope in the lower capacity range than a degraded cell does. The phone's software reads that voltage drop as empty and cuts power — even though capacity remains. One full discharge-to-shutdown followed by a full uninterrupted charge resets the coulomb counter and eliminates premature cutoffs. After that cycle, shutdown should occur below 5% as expected.

Phone feels warm near the battery during the first charge on a new cell

A brand-new high-impedance cell generates more heat during the initial charge than a broken-in cell does — internal resistance drops after the first few cycles. The SPV's charge IC does not reduce current for a new cell automatically. If the warmth is noticeable but not hot to the touch, this is normal and resolves by the third charge cycle. If the back of the phone becomes too hot to hold, remove the battery and check that the contacts are fully seated and not shorting against the battery bay edge.