LG MS330 Replacement Battery BL-46ZH 3.8V 1950mAh

LG MS330 / K7 / Tribute 5 — 3.8V Li-ion Replacement Battery (BL-46ZH)

This is a 3.8V, 1950mAh Li-ion replacement battery for the LG MS330, K7, K7 LTE, and Tribute 5 smartphones. It uses OEM part number BL-46ZH (also listed as EAC63079701). Swap it in when the original cell no longer holds adequate charge or fails to power the phone through normal daily use.

• MS330, K7, and Tribute 5 platform compatibility: These models share the same battery bay dimensions, connector pinout, and BMS handshake protocol. The BL-46ZH form factor — 69.42 × 47.94 × 4.75mm — fits all of them without modification.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on an MS330 unit. The BMS communicated correctly with the phone's charge IC, accepted a full charge without error flags, and reported stable voltage readings throughout the discharge curve.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This lets the fuel gauge IC map the new cell's actual discharge curve before high-current charging runs against an uncalibrated coulomb counter.

Sudden shutdown at 20–30% on the replacement cell

This happens because the fuel gauge IC is still running the discharge model it built around the old, degraded cell. The new cell has a steeper voltage cliff at the low end, and the phone's SOC estimate lags behind the actual cell voltage. Under modem or screen load, real cell voltage drops faster than the gauge expects, triggering a hardware undervoltage cutoff before the display ever reaches 0%. One full discharge-to-shutdown followed by an uninterrupted charge to 100% gives the coulomb counter enough data to relearn the curve. After that cycle, low-percentage shutdowns should stop.

Phone warm near the battery during the first few charges

A new Li-ion cell typically has higher internal impedance than a broken-in cell. The charge IC on the MS330 pushes current at a fixed rate, and the higher impedance converts more of that energy to heat in the first few cycles. This is normal and tapers off as the cell completes its initial formation cycles — usually within three to five full charges. If warmth persists beyond that or the phone becomes hot to the touch, check that the replacement cell's BMS is not blocking the charge IC's termination signal, which would prevent the phone from dropping to trickle charge at full capacity.