HTC Desire 516 B0PB5100 Replacement Battery 3.7V 1500mAh

HTC Desire 516 Series — 3.7V Li-ion Replacement Battery (B0PB5100)

This is a 3.7V, 1500mAh Li-ion replacement battery for the HTC Desire 516 smartphone and its regional variants, including the 516t, 516c, and 516w. It uses OEM part number B0PB5100 and matches the original cell's dimensions at 69.90 × 54.96 × 4.30mm. Fit is confirmed across the full Desire 516 family.

• Desire 516 variant compatibility: The 516t, 516c, and 516w share the same battery bay geometry, connector pinout, and BMS handshake protocol as the base 516. All variants run the same 3.7V nominal voltage rail, so one cell covers the entire lineup without modification.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the Desire 516 platform. The BMS accepted the charge profile without fault flags, and the protection circuit triggered correctly at low-voltage cutoff — no thermal events observed across three full cycles.
• Fuel gauge recalibration on first install: After fitting this cell, run one complete discharge down to automatic shutdown, then charge uninterrupted to 100% before normal use. The Desire 516's fuel gauge IC was calibrated to the old cell's discharge curve — skipping this step causes the coulomb counter to report inaccurate percentages from the first charge.

Why the Desire 516 reports wrong battery percentage after a cell swap

The Desire 516 uses a fuel gauge IC that tracks charge state against a stored discharge curve from the previous cell. When a new cell goes in, that stored curve no longer matches the actual chemistry of the replacement. The IC keeps estimating from the old data, so the percentage reading drifts — showing 40% when the phone is closer to 15%, for example. One full discharge-to-shutdown followed by an uninterrupted charge to 100% forces the IC to relearn the new cell's voltage-capacity relationship and restores accurate reporting.

Sudden shutdown at 20–30% on the replacement cell

This happens when the cell voltage drops below the modem or display's minimum threshold under load — even though the gauge still reads a comfortable percentage. The replacement cell's internal impedance is slightly higher than a broken-in cell, so voltage sags faster during high-draw events like LTE data or screen-on bursts. The BMS trips the cutoff before the gauge catches up. Run two full calibration cycles as described above; after the fuel gauge relearns the discharge curve, the reported percentage will align with the actual voltage cliff, and the premature shutdowns stop.