Elephone P8000 Compatible Battery SD506193PE 3.8V 4100mAh

Elephone P8000 — 3.8V Li-Polymer Replacement Battery (SD506193PE)

This is a 3.8V, 4100mAh Li-Polymer cell for the Elephone P8000 smartphone. It replaces the original SD506193PE battery when capacity has degraded to the point where the phone no longer holds a charge through a normal day. Dimensions are 93.00 × 60.50 × 5.20mm — verify against your existing cell before fitting.

• P8000 cell compatibility: The P8000 uses a bare Li-Polymer pouch cell with no external BMS daughterboard — the protection circuit is integrated into the phone's charge IC. Any replacement cell must match the SD506193PE footprint exactly so the pouch seats flat against the frame without pressure on the display assembly.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the P8000 platform and confirmed the charge IC accepted the cell without fault flags. The BMS held charge termination at 4.35V and low-voltage cutoff triggered correctly before cell damage could occur.
• Fuel gauge recalibration on first use: After fitting, disable fast charging and run one complete discharge-to-charge cycle at standard rate. This lets the fuel gauge IC map the new cell's discharge curve before high-current charging begins pushing current into an uncalibrated coulomb counter.

Why the P8000 reports wrong battery percentage after a cell swap

The P8000's fuel gauge IC stores a learned discharge curve from the original cell. When a new cell goes in, the IC is still referencing that old curve, so percentage readings drift from the first charge. The fix is one full discharge — down to automatic shutdown — followed by a complete charge at standard current. After that cycle, the coulomb counter resets against the new cell's actual capacity and percentage readings stabilise.

Sudden shutdown at 20–30% on the replacement cell

This is a voltage cliff issue, not a calibration error. Under heavy load — mobile data, screen-on brightness, or GPS — the cell voltage drops sharply below what the fuel gauge predicted, and the system cuts power to protect the cell. It happens most often when the fuel gauge IC has not yet completed a calibration cycle on the new cell. Run one full discharge to shutdown and a full recharge at standard rate. If shutdowns continue after two full cycles, check that the replacement cell is seated flat with no edge pressure compressing the pouch.