Allview C6 Compatible Battery 3.8V 1800mAh Li-ion

Allview C6 / C6 Quad 4G — 3.8V Li-ion Replacement Battery

This 3.8V, 1800mAh Li-ion cell replaces the original battery in the Allview C6 and C6 Quad 4G smartphones. It restores power to devices that no longer hold a charge or shut down unexpectedly. Dimensions are 67.55 × 56.95 × 4.10mm — measure your original before fitting.

• C6 and C6 Quad 4G fitment: Both models share the same battery bay dimensions, 3.8V nominal rail, and connector pinout. The cell slots into either variant without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the C6 platform. The BMS accepted charge from 0% and the protection circuit tripped correctly at the low-voltage cutoff threshold.
• Fuel gauge recalibration on first use: After fitting, disable fast charging and run one full discharge-to-charge cycle before relying on the percentage indicator. The fuel gauge IC on the C6 is calibrated to the old cell's discharge curve. One complete cycle lets it remap against the new cell and report accurate percentages.

Sudden shutdown at 20–30% on the Allview C6 after a cell swap

The C6's fuel gauge IC stores a discharge curve from the original cell. A new cell has a slightly different voltage-to-capacity profile, so the IC misjudges how much charge remains. Under modem load or screen-on draw, voltage drops faster than the IC expects and the protection circuit cuts power — even though the reported percentage looks safe. One full discharge and charge cycle forces the coulomb counter to resync with the new cell's actual curve. After that cycle, shutdowns at 20–30% typically stop.

Phone warm near the battery during the first few charges after replacement

A new cell has higher internal impedance than a used one. The charge IC on the C6 pushes current in at a fixed rate, and higher impedance means more energy converts to heat during those early cycles. This is normal for the first two to three charge cycles as the cell forms. If warmth persists beyond that point, check that the back cover is seated flat — any gap reduces heat dissipation and can cause the charge IC to throttle or trigger a fault. Charging should normalise once internal impedance drops after initial cycling.