Gionee GN128 Replacement Battery BL-G016A 3.7V 1350mAh

GIONEE GN128 — 3.7V Li-ion Replacement Battery (BL-G016A)

This is a 3.7V, 1350mAh Li-ion cell built to OEM part number BL-G016A, fitting the GIONEE GN128 smartphone. It replaces the original battery when capacity has dropped to the point where the phone no longer holds a useful charge. Dimensions are 62.01 × 52.90 × 4.41 mm — measure your existing cell before fitting if the back cover has any signs of swelling.

• GN128 fitment: The GN128 uses a removable back panel with a direct-contact battery connector. BL-G016A carries the matching contact strip and connector pitch for that board layout — no adapters, no bending tabs to make it seat.
• Bench tested on actual hardware: We cycled this cell through a full discharge-charge sequence and monitored the BMS handshake at the charge IC. Charge acceptance was consistent from the first cycle, with no false-full cutoff on the initial pass.
• Fuel gauge recalibration on first use: On first use after installation, disable fast charging for one complete discharge-charge cycle. This gives the fuel gauge IC time to map the new cell's actual discharge curve before high-current charging pushes current into an uncalibrated cell — reducing erratic percentage readings early on.

Sudden shutdown at 20–30% on a replacement cell in the GN128

The GN128's fuel gauge IC stores a discharge curve learned from the original cell. When a new cell goes in, that stored curve no longer matches the actual voltage-vs-capacity relationship of the replacement. Under modem or display load, the cell voltage can drop sharply in the lower charge band — hitting the BMS undervoltage cutoff before the OS even registers low battery. The phone reads 25%, but the cell is already below the safe floor. One full discharge down to auto-shutoff, followed by an uninterrupted charge to 100%, forces the coulomb counter to resync against real cell behaviour.

Phone shows incorrect battery percentage after fitting BL-G016A

The fuel gauge IC in the GN128 is calibrated to the capacity curve of the cell it has been tracking. Fitting a new 1350mAh cell resets that physical baseline, but the IC's internal model still reflects the degraded old cell. The result is percentage readings that jump, stall, or report full charge well before the cell is actually topped up. Let the phone discharge fully until it shuts itself off, then charge in one unbroken session to 100% without unplugging — this gives the IC a complete charge window to rewrite its curve against the new cell.