ELF0160 HTC Touch Replacement Battery 3.7V 1100mAh

HTC Touch P3450 Series — 3.7V Li-ion Replacement Battery (ELF0160)

This is a 3.7V, 1100mAh Li-ion battery for the HTC Touch and its P-series variants — P3050, P3450, and P3452 among others. It replaces OEM part numbers ELF0160, 35H00095-00M, and FFEA175B009951. The cell matches the original dimensions at 51.53 × 37.36 × 5.35mm and seats into the original bay without modification.

• P3050, P3450, P3452 compatibility: These models share the same battery bay geometry, 3.7V single-cell architecture, and connector pinout. The BMS handshake requirements across the range are identical, so one cell fits the full group without firmware or connector conflicts.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the P3450 platform. The BMS accepted the charge IC handshake without error flags, and the protection circuit tripped correctly at the low-voltage cutoff threshold during discharge stress testing.
• Fuel gauge recalibration on first cycle: The HTC Touch uses a fuel gauge IC that tracks coulombs against the old cell's discharge curve. After swapping cells, run one full discharge to automatic shutdown, then charge uninterrupted to 100% before normal use. Skipping this step causes the percentage readout to be inaccurate for several days.

Why the HTC Touch reports wrong battery percentage after a cell swap

The fuel gauge IC on the HTC Touch learns the cell's discharge curve by tracking cumulative charge and discharge over time. When a new cell goes in, the IC still references the degraded curve of the old battery. This mismatch causes the percentage to read high or jump erratically until the IC recalibrates. One complete discharge-to-shutdown followed by a full uninterrupted charge resets the coulomb counter against the new cell's actual capacity.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops sharply under load — the screen backlight and radio together pull enough current to cause a brief voltage sag below the BMS cutoff, even while the fuel gauge still reads 20–30%. The root cause is the fuel gauge IC reading a state-of-charge estimate, not live cell voltage. Under combined screen and modem load, a cell sitting near 3.5V can sag to the 3.0V cutoff instantly. Charge to full and run the recalibration cycle above — if shutdowns persist, check that the battery contacts are clean and making firm contact.