HTC Incredible S Replacement Battery 3.7V 2400mAh BG32100

HTC Incredible S — 3.7V Li-ion Replacement Battery (BG32100)

This is a 3.7V Li-ion cell rated at 2400mAh (8.88Wh), replacing part number BG32100 in the HTC Incredible S and Incredible S S710E (PG32130). It slots into the original battery bay and connects to the same three-contact terminal the phone's charge IC expects. Fits the S710E variant without modification.

• Incredible S / S710E compatibility: Both the standard Incredible S and the S710E share the same battery bay dimensions, contact layout, and BMS handshake requirements. The BG32100 footprint — 65 × 43 × 10mm — is common across this line, so one cell covers the full group without any adapter.
• Bench tested on actual hardware: We cycled this cell through a full discharge-charge sequence on the S710E, monitoring the charge IC handshake. The BMS accepted the cell on the first connection, and the protection circuit tripped correctly at the low-voltage cutoff threshold during the discharge run.
• Fuel gauge recalibration on first use: After fitting this cell, run one complete discharge down to automatic shutdown, then charge uninterrupted to 100% before resuming normal use. The Incredible S uses a coulomb counter that was calibrated to the old cell's discharge curve — skipping this step causes the gauge to read incorrectly from day one.

Sudden shutdown at 20–30% on the Incredible S after a cell swap

This is a voltage cliff issue, not a capacity problem. Under modem load or screen-on draw, a new cell with an uncalibrated fuel gauge IC can hit its actual voltage floor while the OS still reports 20–30% remaining. The phone shuts down because the cell voltage drops below the safe operating threshold, even though the percentage shown looks safe. One full discharge-charge cycle recalibrates the coulomb counter and eliminates this behaviour.

HTC Incredible S not powering on after sitting in storage

If a battery has been in storage for several months and the cell voltage has dropped below approximately 2.5V, the BMS enters a lockout state to prevent charging a deeply discharged lithium cell at full current. The phone will show no response — no boot screen, no charging indicator. Connect to a wall charger rather than a PC port, which supplies enough current for the charge IC to trickle-charge the cell back above the BMS recovery threshold. Once the cell climbs above 3.0V, normal charging resumes.