Gionee GN706L Replacement Battery 3.7V 2100mAh BL-N2100

GIONEE GN706 / GN706L — 3.7V Li-Polymer Replacement Battery (BL-N2100)

This is a 3.7V 2100mAh lithium-polymer cell for the GIONEE GN706 and GN706L smartphones. It replaces OEM part number BL-N2100, fitting both model variants directly. Total energy capacity is 7.77Wh.

• GN706 and GN706L compatibility: Both handsets share the same battery bay dimensions, connector pinout, and BMS communication protocol. The GN706L is a network-variant of the GN706 — the power circuit and fuel gauge IC are identical across both, so one cell fits either board without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the GN706 platform. The BMS accepted charge current on first connection, thermals stayed within spec, and the protection circuit tripped correctly at the low-voltage cutoff threshold without latching permanently.
• Fuel gauge recalibration on first install: On first use after fitting, disable fast charging and run one full discharge-to-charge cycle at standard current. The fuel gauge IC on this phone calibrates against the cell's discharge curve — skipping this step leaves the coulomb counter referenced to the old cell, which causes erratic percentage readings for the first several days.

Sudden shutdown at 20–30% on the GN706L after a cell swap

This is a voltage cliff issue, not a capacity fault. Under modem transmission load or screen brightness spikes, the cell voltage drops sharply. If the fuel gauge IC is still calibrated to the old cell's curve, it reads 25% when the actual cell voltage is already near the BMS cutoff floor. The phone shuts down because the hardware voltage rail collapses, even though the percentage display showed charge remaining. One complete discharge cycle — draining to automatic shutdown, then charging uninterrupted to 100% — resets the coulomb counter against the new cell's actual voltage curve and eliminates false shutdowns.

Phone warm near the battery compartment during the first charge

A new lithium-polymer cell arrives with elevated internal impedance compared to a conditioned cell. On first charge, the charge IC pushes current into higher-than-normal resistance, generating more heat than you'd see after a few cycles. This is expected and temporary. If the phone is warm to the touch but not hot, and warmth stops after two or three charge cycles, the cell is conditioning normally. If surface temperature feels genuinely hot or charging stops before 100%, check that the battery connector is fully seated — a partial connection raises contact resistance and compounds the heat problem.