About this replacement
Kyocera DuraForce XD / E6790 — 3.7V Li-Polymer Replacement Battery (SCP-65LBPS)
This 3.7V, 3020mAh Li-Polymer battery replaces the factory cell in the Kyocera DuraForce XD, E6790, and E6790 LTE smartphones. It matches OEM part numbers SCP-65LBPS and 5AAXBT091GEA. If your DuraForce XD is shutting down early, charging slowly, or holding less capacity than it used to, the cell has degraded and needs replacing.
- DuraForce XD / E6790 platform fit: All three listed models share the same battery bay geometry, connector pinout, and BMS handshake protocol. The E6790 and E6790 LTE are hardware variants of the same platform, so one cell covers all three without modification.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the DuraForce XD, monitoring BMS communication, charge acceptance, and cutoff behavior. The battery negotiated correctly with the device charge IC and held capacity within spec across multiple cycles.
- Fuel gauge recalibration on first use: On first use after installation, disable fast charging and run one complete discharge-charge cycle at standard rate. This lets the fuel gauge IC build an accurate discharge curve against the new cell before high-current charging begins on an uncalibrated coulomb counter.
Sudden shutdown at 20–30% on the DuraForce XD after a cell swap
This happens when the fuel gauge IC is still calibrated to the old cell's discharge curve. The reported percentage does not match actual cell voltage, so the phone shuts down before the gauge reaches zero. Under modem load or screen brightness spikes, the new cell's voltage drops faster than the IC expects, triggering a hard cutoff. Run one full discharge to 0% and a full charge to 100% without interruption — the coulomb counter resets against the new curve after that cycle.
USB fast charging not activating on the first cycle after replacement
On the first charge after a cell swap, the charge IC may not negotiate the fast-charge protocol because it detects an uncalibrated BMS state. This is a protection behavior — the IC defaults to standard 5V/1A until it confirms the new cell is safe to push high current into. Charge once at standard rate until full, then disconnect and reconnect the cable. Fast charging typically resumes from the second cycle onward once the BMS has logged a complete charge event.