PBR-C530 Pantech Reveal C790 Replacement Battery 3.7V 800mAh

Pantech Reveal C790 Aladdin / C530 Series — 3.7V Li-ion Replacement Battery (PBR-C530)

This is a 3.7V, 800mAh Li-ion cell replacing the OEM PBR-C530 battery. It fits the Pantech Reveal C790 Aladdin, C530, C530 Slate, Link P7040, and six additional Pantech handsets sharing the same connector and voltage rail. Dimensions are 44.05 × 39.27 × 5.51mm — measure your bay before ordering if you're unsure of your exact variant.

• C530 and C790 platform compatibility: These models share the same single-cell 3.7V Li-ion architecture, connector pinout, and BMS communication protocol. One cell fits across the lineup without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a C530 body. The BMS handshake initialised correctly on first insertion, charge IC accepted the cell without rejecting it, and protection circuits tripped at expected voltage thresholds.
• Fuel gauge recalibration on first use: On first install, run one full discharge down to auto-shutoff, then charge uninterrupted to 100% without pulling the phone off charge early. The Pantech fuel gauge IC reads coulomb data against a stored discharge curve — skipping this step causes the percentage display to drift against the new cell's actual capacity.

Sudden shutdown at 20–30% on the C790 and C530

The C790 and C530 run a modem radio and display backlight simultaneously during calls or video — two high-draw loads that spike current demand instantly. A cell with any internal resistance above spec cannot sustain voltage under that combined load, and the BMS reads the resulting sag as a hard undervoltage condition. The phone cuts out even though the fuel gauge still shows charge remaining. Completing one full calibration cycle after install reduces this — the fuel gauge IC learns the actual voltage cliff of the new cell and adjusts its cutoff estimate accordingly.

Phone won't power on after the battery sat in storage

Li-ion cells left uncharged for extended periods drop below 2.5V per cell, which triggers a BMS lockout to prevent unsafe charging into a depleted cell. The Pantech C530 and C790 will not boot from this state — the screen stays dark and the charge indicator may not respond. Connect the phone to a wall adapter, not a PC USB port, and leave it for 20–30 minutes before attempting to power on. Once voltage recovers above the BMS reinitialisation threshold — typically around 2.9V — the phone will begin a normal charge cycle.