About this replacement
Kyocera DuraForce Pro E6810 / E6820 / E6830 — 3.8V Li-ion Replacement Battery (SCP-67LBPS)
This is a 3.8V, 3100mAh (11.78Wh) Li-ion cell built to replace the OEM SCP-67LBPS battery in the Kyocera DuraForce Pro series. It fits the E6810, E6820, and E6830 variants. The connector and cell dimensions match the original bay — 96.50 × 53.10 × 5.05mm.
- E6810 / E6820 / E6830 compatibility: All three DuraForce Pro variants run the same 3.8V power rail and use the same BMS handshake protocol. One battery part number — SCP-67LBPS — covers all of them because Kyocera kept the connector, BMS interface, and cell format identical across the E68xx family.
- Bench tested on actual hardware: We cycled this cell through full charge and load discharge on the DuraForce Pro platform. The BMS accepted the new cell without error flags, and the charge IC stepped through trickle, constant-current, and constant-voltage phases as expected.
- Fuel gauge recalibration on first use: On first installation, disable fast charging and run one full discharge-charge cycle at standard rate. The DuraForce Pro's fuel gauge IC maps its coulomb counter to the discharge curve of the installed cell — doing this before enabling fast charging prevents the gauge from feeding current into an uncalibrated profile.
Sudden shutdown at 20–30% on the DuraForce Pro after a cell swap
This is a voltage cliff problem, not a capacity problem. When the modem fires at full power — during a call, data burst, or GPS fix — it pulls a sharp current spike. If the fuel gauge IC hasn't completed a calibration cycle against the new cell's discharge curve, it can misread the state of charge by 15–25%. The cell voltage drops below the BMS cutoff threshold under that load spike before the gauge shows anything near zero. Run one full discharge to auto-off, then charge uninterrupted to 100%, and the fuel gauge resets its reference points against the actual cell.
USB-PD fast charge not activating after replacement
On the first charge cycle after installing a new cell, the DuraForce Pro's charge IC may default to standard 5V charging rather than negotiating USB-PD. This happens because the BMS presents a higher internal impedance on a fresh, unconditioned cell — the charge IC reads this and falls back to a safe baseline protocol. Disconnect the cable, power the phone off completely, then reconnect to the charger. After the first full standard-rate cycle completes, cell impedance drops and USB-PD negotiation re-engages normally on subsequent charges.