NIKI160 HTC Touch Dual Li-Polymer Replacement Battery 3.7V 1200mAh

HTC Touch Dual / Neon 300 — 3.7V Li-Polymer Replacement Battery (NIKI160)

This is a 3.7V, 1200mAh Li-Polymer cell built to replace the original battery in the HTC Touch Dual, Touch Dual US, Touch Dual P5310, and Neon 300. It matches the OEM part numbers NIKI160, 35H00103-00M, and 35H00103-01M. The physical dimensions are 44.36 × 46.50 × 6.38mm, so it seats flush inside the original battery bay.

• Touch Dual and Neon 300 compatibility: These models share the same battery bay dimensions, connector pinout, and charge IC handshake. One cell covers all variants because the voltage rail and BMS communication protocol are identical across the Touch Dual US, P5310, and Neon 300 hardware revisions.
• Bench tested on actual hardware: We cycled this cell through charge, standby, and active screen-on load on the Touch Dual platform. The BMS held the charge termination voltage correctly and did not trip an overcurrent fault during modem-active draw spikes.
• Fuel gauge recalibration on first cycle: On first use after installation, run one complete discharge down to automatic shutdown, then charge uninterrupted to 100%. This gives the fuel gauge IC a full reference curve against the new cell — skipping this step causes the percentage counter to read against the old cell's discharge profile.

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

The Touch Dual uses a coulomb counter that builds its percentage model from historical charge and discharge data stored against the old cell. When a new cell goes in, that stored curve no longer matches the actual voltage-to-capacity relationship of the replacement. The gauge reads voltage correctly but maps it to the wrong percentage point. One full discharge-to-shutdown followed by an uninterrupted charge resets the reference baseline. After that cycle, percentage readings track accurately against the new cell's actual capacity.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops below the BMS cutoff threshold under load even though the displayed percentage looks safe. On the Touch Dual, the modem and backlight together can pull enough current to cause a brief voltage sag that the protection circuit reads as a critical undervoltage event. The phone shuts down not because the cell is empty but because instantaneous voltage dipped below 3.0V. If this occurs repeatedly, let the phone discharge fully to auto-shutdown and recharge to 100% — this recalibrates the fuel gauge so the OS begins showing the real low-voltage point rather than a stale estimate.