BlackView BV7000 Replacement Battery 3.8V 3400mAh V575868P

BlackView BV7000 — 3.8V Li-Polymer Replacement Battery (V575868P)

This 3.8V 3400mAh Li-Polymer cell replaces the original V575868P battery in the BlackView BV7000 rugged Android smartphone. It restores power to the processor, display, modem, and all onboard electronics. Capacity figures are taken directly from our product data — 12.92Wh at 3.8V nominal.

• BV7000 cell fitment: The BV7000 uses a sealed rear housing with a glued-in Li-Polymer pouch cell. The V575868P footprint is 67.70 × 57.30 × 5.64mm — any deviation in thickness causes pressure on the display assembly. Confirm measurements before sealing the phone.
• Bench tested on actual hardware: We cycled this cell through charge, idle draw, and modem-active discharge. The BMS held charge termination at 4.35V and triggered low-voltage cutoff cleanly without a false positive shutdown above 3.2V.
• Fuel gauge recalibration on first use: Disable fast charging for the first full discharge-to-charge cycle after fitting this cell. The fuel gauge IC on the BV7000 is calibrated to the old cell's discharge curve. One slow cycle lets the coulomb counter reset against the new cell before high-current charging begins.

Sudden shutdown at 20–30% on the BV7000 after a cell swap

A new Li-Polymer cell has a different internal resistance profile than a degraded original. When the modem transmits or the screen peaks in brightness, instantaneous current demand spikes. If the fuel gauge IC still holds the old cell's voltage-to-capacity map, it cannot predict the voltage cliff that occurs under load at lower state-of-charge. The phone's protection circuit reads the voltage drop as a critical threshold and cuts power. Run one full discharge cycle without fast charging — let the cell drain to automatic shutdown, then charge to 100% on standard charge — and the gauge recalibrates to the new curve.

OS reporting wrong battery percentage after replacement

The BV7000 tracks capacity through a coulomb counter inside the fuel gauge IC. After a cell swap, the counter still references the charge-curve data it built up against the degraded original. This causes the reported percentage to jump erratically or read full charge well below 4.35V. The fix is one complete uninterrupted cycle — drain the phone until it powers off automatically, then charge to 100% without interruption. After that cycle the IC rewrites its reference curve to match the new cell and percentage reporting stabilises.