About this replacement
Dell Latitude 13 5320 / 7320 Series — 11.4V Li-Polymer Replacement Battery (MHR4G / 1PP63 / 727CG)
This 11.4V, 3650mAh (41.61Wh) Li-Polymer battery replaces the original cell in Dell Latitude 13 5320, Latitude 7320, and over 40 additional Latitude variants. It matches the OEM voltage rail and physical footprint for a direct swap without hardware modification. Install it when the original cell no longer holds charge or when Windows reports degraded battery health.
- Latitude 5320 / 7320 platform fit: These models share an 11.4V three-cell architecture with the same connector pinout and BMS handshake protocol. Part numbers MHR4G, 1PP63, 727CG, 9JM71, HDGJ8, 4M1JN, and TN2GY are all cross-compatible across this generation — Dell used multiple OEM codes for the same physical cell depending on build region and supplier batch.
- Bench tested on actual hardware: We ran this cell on a Latitude 7320 unit and confirmed the BMS completed its initialisation handshake, charge current ramped correctly through CC/CV phases, and the BIOS battery page reported capacity without error flags.
- Post-install calibration cycle: After fitting this cell, discharge the laptop fully until it hibernates, then charge uninterrupted to 100% without interruption. This forces the fuel gauge IC to re-learn the new cell's actual capacity curve and clears the false "poor health" warning the BIOS displays after every cell swap.
BIOS reporting battery health as poor immediately after replacement
Dell's BIOS reads health data from the battery's EEPROM, which stores charge cycle count and rated Wh from the original cell's firmware. A replacement cell resets that EEPROM, so the BIOS flags the mismatch as degraded health even when the new cell is fully functional. Running one complete discharge-to-hibernate followed by a full uninterrupted charge allows the fuel gauge IC to write fresh baseline data. After two to three full cycles, the health status in Dell Power Manager normalises.
Laptop shutting down at 20–30% charge shown on screen
This happens when the fuel gauge IC has not yet calibrated against the new cell's actual voltage curve. The OS reads a fuel gauge estimate from the old curve, so the displayed percentage does not match real cell voltage — the laptop hits the hardware low-voltage cutoff while the screen still shows 20–30% remaining. It is not a fault with the replacement cell. Run two full discharge-to-hibernate cycles and the gauge recalibrates; shutdowns should move to below 5% reported charge, which is normal BMS low-voltage protection at approximately 9.0V pack voltage.