BBK VIVO I530 Replacement Battery BK-BL-5C 3.7V 750mAh

BBK VIVO I530 / I589 / K118 / K119 — 3.7V Li-ion Replacement Battery (BK-BL-5C)

This is a 3.7V, 750mAh Li-ion cell built to the BK-BL-5C specification. It fits the BBK VIVO I530, I589, K118, and K119, plus three additional VIVO models sharing the same battery footprint. If the original cell no longer holds a charge or the phone shuts down unexpectedly, this is the direct swap.

• VIVO I530 / I589 / K118 / K119 platform fit: These models run on the same 3.7V power rail and share the BK-BL-5C connector layout and cell dimensions (53.00 × 33.90 × 5.70mm). The BMS handshake is consistent across this VIVO platform, so one cell revision covers the full group.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the VIVO I530 platform. The BMS accepted charge without cutoff errors, and cell voltage held stable at 3.7V nominal throughout the test sequence.
• Fuel gauge recalibration on first use: After fitting this cell, disable fast charging and run one full discharge-to-charge cycle before normal use. The phone's fuel gauge IC is still calibrated to the old cell's discharge curve — one complete cycle lets it map the new cell correctly before high-current charging begins.

Sudden shutdown at 20–30% on the VIVO I530 after a cell swap

The VIVO I530's fuel gauge IC stores a discharge curve from the original cell. When a new cell goes in, the stored curve no longer matches actual cell voltage under load. The modem or screen pulls current, cell voltage sags below the shutdown threshold before the gauge reaches 0%, and the phone cuts out. One full discharge-to-charge cycle without interruption forces the coulomb counter to rebuild the curve against the new cell. After that cycle, shutdowns at 20–30% typically stop.

Phone warm near the battery during the first charge on the replacement cell

A new Li-ion cell arrives with slightly higher internal impedance than a broken-in cell. During the first charge cycle, the charge IC pushes current into that higher-impedance cell, and some energy converts to heat rather than stored charge. This is normal and reduces after two or three cycles as the cell's impedance settles. If warmth persists beyond the third charge, check that the charge IC is not stuck in fast-charge mode — drop to a 5V/1A charger and confirm skin temperature falls below 40°C.