About this replacement
BlackBerry 7130C — 3.7V Li-ion Replacement Battery (BAT-06860-001)
This 3.7V 1900mAh Li-ion cell replaces the original battery in the BlackBerry 7130C smartphone. It fits the compact CDMA 7130C body and uses the same OEM connector and contact layout. Capacity is rated at 7.03Wh — matching the original specification for this mid-2000s device.
- 7130C platform fit: The 7130C uses a single-cell Li-ion pack with a three-contact interface feeding the onboard charge IC. This replacement matches that voltage rail and contact pinout directly — no adapter or modification needed.
- Bench tested on actual hardware: We ran this cell through the 7130C charge IC and confirmed BMS handshake, stable 4.2V termination voltage, and clean cutoff at the low-voltage threshold. The fuel gauge IC accepted the cell without throwing a fault.
- Fuel gauge recalibration on first use: After fitting this cell, run one full discharge down to auto-shutoff, then charge uninterrupted to 100% before normal use. The 7130C fuel gauge IC needs one complete cycle against the new cell's discharge curve to report accurate percentages.
Sudden shutdown at 20–30% on the 7130C after a cell swap
The 7130C's fuel gauge IC was calibrated to the old cell's internal resistance and discharge curve. A fresh cell has a different impedance profile, so the gauge misjudges the remaining voltage headroom. Under modem load — during a call or data sync — the actual cell voltage drops below the BMS cutoff threshold even though the display shows charge remaining. One full discharge-to-shutoff cycle followed by an uninterrupted charge to 100% lets the coulomb counter recalibrate and eliminates these false-floor shutdowns.
Phone won't power on after the replacement cell sat in storage
Li-ion cells self-discharge during storage. If this battery shipped or sat unused long enough to drop below 2.5V per cell, the BMS enters a protective lockout and the 7130C will not respond to a normal power-on press. Connect to a wall charger — not a USB port — and leave it for 20–30 minutes without pressing any buttons. The charge IC delivers a trickle recovery current that brings the cell above the BMS re-enable threshold; once it crosses approximately 2.9V the phone will respond normally and full charging will begin.