About this replacement
HP 7 Plus G2 — 3.7V Li-Polymer Replacement Battery (790590-001)
This 3.7V, 2400mAh lithium-polymer battery replaces the original cell in the HP 7 Plus G2 and 7 Plus G2 1331 tablets. It matches OEM part numbers 790590-001 through 790594-001, WD3058150P, and 790587-001. Capacity figures come from the product data — 2400mAh / 8.88Wh.
- 7 Plus G2 and 7 Plus G2 1331 compatibility: Both models share the same 3.7V voltage rail, connector pinout, and BMS handshake protocol, which is why a single cell covers the full variant range. The 152.28 × 58.20 × 2.83mm footprint matches the original battery bay without modification.
- Bench tested on actual hardware: We cycled this cell on the 7 Plus G2 platform and monitored BMS communication through charge and discharge. The protection circuit responded correctly to charge termination at full voltage and to low-voltage cutoff without triggering false shutdowns.
- Fuel gauge recalibration after installation: After fitting this battery, run the tablet down to automatic shutoff, then charge it uninterrupted to 100% in one session. The HP 7 Plus G2 fuel gauge IC calibrates against the cell it first sees — skipping this step causes the percentage display to read incorrectly from day one.
HP 7 Plus G2 shutting down between 15–25% remaining
The HP 7 Plus G2 draws simultaneous load from the display backlight, WiFi radio, and CPU during active use. At around 3.6V, this combined draw creates a voltage sag the fuel gauge misreads as a deeper discharge than it actually is. The BMS then triggers a protective cutoff, even though nominal capacity remains. Running one full discharge-to-shutoff cycle followed by an uninterrupted full charge lets the fuel gauge map the actual voltage curve of the new cell and pushes the premature cutoff point down closer to 5–8%.
HP 7 Plus G2 showing incorrect battery percentage after battery swap
The fuel gauge IC on the HP 7 Plus G2 stores learned capacity data from the old cell — it does not automatically reset when a new battery is installed. This mismatch causes the percentage to jump, drop erratically, or stall at a fixed number. The fix is a single full calibration cycle: discharge to automatic shutoff, then charge to 100% without interruption. After that cycle the gauge reads against the actual charge curve of the new 2400mAh cell.