HTC One Max Replacement Battery B0P3P100 3.8V 3300mAh

HTC One Max / T6 Series — 3.8V Li-Polymer Replacement Battery (B0P3P100)

This 3.8V, 3300mAh Li-Polymer cell replaces the original battery in the HTC One Max, One Max 8060, One Max LTE, and T6. The B0P3P100 is the factory part number across this lineup. Capacity figure is from the product data — 12.54Wh total energy.

• One Max / T6 platform fit: HTC used the same 3.8V Li-Polymer form factor and connector across the One Max 8060, LTE variant, and T6. All share the same battery bay dimensions (117.07 × 65.10 × 3.18mm) and the same charge IC handshake, so one cell covers the full range without adapter or modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a One Max unit. The BMS accepted the cell without fault codes, held the 4.35V charge ceiling correctly, and the protection circuit tripped cleanly at low-voltage cutoff as expected.
• Fuel gauge recalibration after installation: On first use, disable any fast-charging mode and run one full discharge-to-charge cycle at standard rate. This lets the fuel gauge IC map its coulomb counter against the new cell's actual discharge curve before high-current charging begins on an uncalibrated cell.

Why the One Max reports wrong battery percentage after a cell swap

The One Max stores a learned discharge curve in its fuel gauge IC tied to the old cell's impedance profile. When a new cell goes in, that stored curve no longer matches reality. The IC reads voltage and estimates state-of-charge against a model built for a degraded cell, so the percentage shown drifts away from actual charge level. One full slow-rate discharge and recharge cycle overwrites the learned model and brings the percentage display back in line.

Sudden shutdown at 20–30% on the replacement cell

This happens when the Snapdragon 600 modem or the 5.9-inch display pulls a current spike the cell voltage cannot sustain under load. The terminal voltage drops briefly below the BMS cutoff threshold even though the fuel gauge still shows charge remaining — the phone shuts off to protect the cell. It is most common in the first few cycles before the fuel gauge IC recalibrates. Run two full discharge-recharge cycles at standard rate; if the shutdowns continue, check that cell terminal voltage reads above 3.5V under normal screen-on load using HTC's built-in battery diagnostics at *#*#3424#*#*.