Huawei A199 Replacement Battery HB505076RBC 3.7V 1650mAh

Huawei Ascend G710 / G610 / G606 / A199 — 3.7V Li-ion Replacement Battery (HB505076RBC)

This is a 3.7V, 1650mAh Li-ion replacement battery for the Huawei Ascend G710, G610, G606, A199, and over 24 additional Huawei smartphone models. It uses OEM part number HB505076RBC and fits the same connector and form factor as the original cell. Dimensions are 75.55 × 49.04 × 4.80mm — measure your existing battery before ordering if you're unsure of your variant.

• Ascend G-series and A199 compatibility: These models share the same 3.7V single-cell architecture, HB505076RBC connector pinout, and BMS handshake protocol — which is why one cell part number covers the full range. The fuel gauge IC on each device reads the same charge curve.
• Bench tested on actual hardware: We cycled this cell through full discharge and charge on the Ascend G710. The BMS accepted the new cell without a protection trip, and charge termination cut off correctly at 4.2V.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-to-charge cycle. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging pushes current into an uncalibrated cell — preventing erratic percentage readings early on.

Why the Ascend G610 reports wrong battery percentage after a cell swap

The G610 uses a coulomb-counter fuel gauge IC that builds its reference model from the original cell's charge and discharge behaviour. When you install a new cell, that reference is stale — the IC is still predicting state-of-charge against the old cell's internal resistance curve. The result is percentage readings that lag reality or jump erratically. One full slow-charge cycle lets the IC collect new coulomb data and rebuild an accurate curve. After that cycle, readings stabilise.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem or display draws a short high-current burst and the cell voltage drops below the BMS cutoff threshold — even though the gauge still shows charge remaining. It's a voltage-sag issue, not a capacity issue: the fuel gauge shows percentage based on stored charge, but can't predict instantaneous sag under load. Run the phone through two full discharge cycles without fast charging. If shutdowns continue below 3.5V under load, the replacement cell may have elevated internal resistance — check open-circuit voltage at rest; it should sit above 3.7V when the gauge reads 50%.