HTC Droid Incredible 2 Replacement Battery BTR6350 3.7V 1350mAh

HTC Droid Incredible 2 — 3.7V Li-ion Replacement Battery (BTR6350)

This is a 3.7V, 1350mAh Li-ion replacement battery for the HTC Droid Incredible 2 (ADR6350, ADR6350VW). It replaces OEM part numbers BTR6350, BTR6350B, 35H00152-04M, and 35H00152-05M. The battery slots into the standard compartment and reconnects to the phone's charge IC and fuel gauge circuit.

• ADR6350 and ADR6350VW compatibility: Both Verizon variants of the Droid Incredible 2 use the same BTR6350 cell format, connector pinout, and BMS handshake. The voltage rail and physical dimensions are identical across the ADR6350 and ADR6350VW — one battery covers both.
• Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle on the ADR6350 platform. The BMS accepted the charge IC handshake without fault flags, and the fuel gauge IC tracked discharge current without resetting mid-cycle.
• Fuel gauge recalibration on first use: After fitting this cell, run one complete discharge down to automatic shutoff, then charge uninterrupted to 100% before using the phone normally. This gives the fuel gauge IC a clean discharge curve to measure against — skipping it causes the percentage counter to drift or read inaccurately for the first several cycles.

Sudden shutdown at 20–30% on the Droid Incredible 2

This happens when the cell voltage drops below what the modem or display load requires, even though the fuel gauge still reads charge remaining. The original fuel gauge calibration was built around the old cell's discharge curve. A new cell with a slightly different curve hits a voltage cliff earlier than the IC expects. The phone interprets this as a hardware fault and cuts power to protect the SoC. Run one full discharge-to-shutoff cycle followed by a full uninterrupted charge — this resets the coulomb counter reference and the shutoffs stop.

Phone won't power on after the replacement battery sat in storage

Li-ion cells in storage self-discharge over time. If the cell dropped below approximately 2.5V per cell, the BMS enters lockout to prevent damage and the phone will not respond to the power button. Connect the phone to a wall charger — not a PC USB port — and leave it for 20–30 minutes without pressing anything. The charge IC needs to trickle current into the cell to bring it above the BMS re-enable threshold before normal charging can begin. If the charging indicator appears within that window, the cell has recovered and will charge normally from there.