HTC CONV160 Smartphone Replacement Battery 3.7V 1100mAh

HTC H4242 / Converse 100 — 3.7V Li-ion Replacement Battery (CONV160)

This is a 3.7V, 1100mAh Li-ion cell replacing the original CONV160 battery in the HTC H4242 and HTC Converse 100 smartphones. It restores capacity lost to cell ageing in phones that no longer hold a charge through a full day of calls and messaging. Voltage and footprint match the original: 45.15 × 37.29 × 6.52mm.

• H4242 and Converse 100 compatibility: Both handsets run the same 3.7V power rail, share the CONV160 cell format, and use the same BMS handshake protocol — one cell covers both devices without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the H4242 platform. The BMS accepted the new cell on first connect, and charge termination triggered correctly at 4.2V with no false-full cutoffs detected.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one full discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before locking in percentage readings — skipping this step causes erratic percentage jumps for the first several cycles.

Sudden shutdown at 20–30% on the HTC H4242 after a cell swap

The H4242's fuel gauge IC holds a discharge model calibrated to the original cell's internal resistance curve. A new cell has lower impedance, so the IC underestimates remaining capacity and calls a low-voltage cutoff earlier than the true state of charge warrants. The modem radio is the usual trigger — it draws a short current spike that pulls cell voltage below the cutoff threshold the IC has set based on stale data. One full uninterrupted discharge cycle from 100% to automatic shutdown, followed by a full charge, resets the coulomb counter and eliminates the premature cutoff.

Phone not powering on after the replacement cell sat in storage

Li-ion cells self-discharge slowly in storage, and if the CONV160 cell drops below approximately 2.5V, the BMS enters a lockout state to prevent further discharge damage. The H4242 will show no signs of life — no boot screen, no charge indicator. Connect the phone to a wall charger rather than a PC port, since a wall adapter supplies consistent 5V at sufficient current to wake the BMS trickle-charge circuit. Leave it connected for 20–30 minutes before attempting to power on; the BMS needs cell voltage above 3.0V before it releases the lockout and allows normal charging to resume.