NIKI160 HTC Touch Dual Replacement Battery 3.7V 2200mAh

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

This 3.7V, 2200mAh Li-ion cell replaces the original battery in the HTC Touch Dual, Touch Dual 850, Touch Dual US, and Neon 300. It also covers six additional HTC variants sharing the same NIKI160 battery format. Part numbers 35H00103-00M and 35H00103-01M are both compatible with this cell.

• Touch Dual platform fit: The Touch Dual, Touch Dual 850, Touch Dual US, and Neon 300 share the same 3.7V battery bay, connector pinout, and BMS handshake. One cell covers the full variant range without modification.
• Bench tested on actual hardware: We ran this cell through charge-discharge cycles on Touch Dual hardware. The BMS accepted charge from the device's onboard charge IC without trip events, and the protection circuit responded correctly to load spikes from the WLAN radio.
• Fuel gauge recalibration on first use: On first installation, run one complete discharge to low cutoff before recharging. This gives the fuel gauge IC a full reference curve against the new cell — without it, the coulomb counter carries over calibration data from the old degraded cell.

Sudden shutdown at 20–30% on the Touch Dual after a cell swap

The Touch Dual's power IC monitors cell voltage under load from the EDGE modem and display backlight simultaneously. A new high-capacity cell has a steeper voltage drop curve than the original degraded cell the fuel gauge IC was calibrated to. When the device pulls peak current, the cell voltage sags below the shutdown threshold before the percentage display catches up. This produces shutdowns that appear random but consistently happen under screen-on or data-active conditions. One full discharge-charge cycle after installation resets the coulomb counter reference and eliminates these cutoffs.

Phone shows wrong battery percentage after installing the replacement cell

Windows Mobile on the Touch Dual relies on a coulomb counter that tracks cumulative charge in and out of the cell. After a cell swap, that counter still holds the discharge curve profile of the original battery. The mismatch means the reported percentage can read 40% while the actual cell voltage is already at 3.6V or lower under load. To recalibrate, discharge the phone until it shuts off on its own, then charge uninterrupted to full — the fuel gauge IC resets its zero and full reference points from that single cycle. After that cycle, percentage readings stabilise to within a few percent of actual cell state.