LG LS995 Replacement Battery BL-T8 3.8V 3500mAh

LG G Flex 2 / LS995 Series — 3.8V Li-Polymer Replacement Battery (BL-T8)

This 3.8V, 3500mAh Li-Polymer cell replaces the OEM BL-T8 battery in the LG LS995, D950, D955, and related Chameleon variants. It fits the curved chassis shared across the G Flex 2 lineup, using the same connector and contact layout as the factory cell. Capacity is rated at 13.3Wh, matching the stock specification.

• LS995 / D950 / D955 platform fit: These models share the same curved battery bay, BL-T8 connector pinout, and BMS handshake protocol. The fuel gauge IC on each device reads cell impedance on first boot — the replacement cell passes that check at the correct voltage range.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on an LS995 unit. The BMS accepted the cell without error flags, and the charge IC handed off correctly at 4.35V full charge. No thermal cutoff events occurred during the test cycle.
• Fuel gauge recalibration on first install: After fitting this cell, disable fast charging and run one full discharge-charge cycle at standard rate. This lets the coulomb counter recalibrate its capacity model against the new cell's discharge curve before high-current charging is applied to an uncalibrated cell.

Why the LS995 reports wrong battery percentage after a cell swap

The LG G Flex 2 uses a coulomb counter tied to the original cell's discharge curve. When a new cell goes in, the counter still references the old curve, so reported percentage drifts from actual charge state. This is most visible between 40–80% where the original cell's curve was well-mapped. One complete slow discharge to shutdown followed by a full charge at standard rate resets the counter's reference points. After that cycle, percentage reporting stabilises.

Sudden shutdown at 20–30% on the replacement cell

This happens when the modem or display pulls a current spike the cell can't sustain at that state of charge, causing voltage to sag below the BMS cutoff threshold. The OS reads 25% but the instantaneous voltage under load drops under 3.4V, triggering a hard shutdown. It's common on the first few cycles before the fuel gauge IC has mapped the new cell's voltage-capacity curve. Run two full slow cycles and the shutdowns typically stop as the gauge learns the actual low-voltage cliff of the replacement cell.