About this replacement
HP Elite X360 830 G11 2 In 1 — 11.55V Li-Polymer Replacement Battery (996QA249H)
This is an 11.55V, 4600mAh (53.13Wh) Li-Polymer battery for the HP Elite X360 830 G11 2-in-1 convertible notebook. It replaces OEM part 996QA249H and fits the full 830 G11 lineup, including 8L3M9AV, 8L3P5AV, 8L3Q2AV, and 38+ additional SKUs. Cell chemistry and BMS signalling match HP's original spec for this platform.
- Elite X360 830 G11 platform fit: Every 830 G11 2-in-1 variant shares the same 11.55V three-cell architecture, connector pinout, and BMS handshake protocol — which is why one cell covers the full SKU range. Swapping to a cell with mismatched BMS firmware triggers BIOS health warnings even when the cell itself is fine.
- Bench tested on actual hardware: We ran this cell on an 830 G11 unit and cycled it through HP's BIOS battery learn routine. The BMS reported correct Wh capacity, charge state tracked accurately after two full cycles, and charge acceptance reached 100% without tripping the firmware charge limit.
- Post-install calibration — Elite X360 830 G11 specific: After fitting, run one full discharge to hibernate cutoff, then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the inaccurate health warning that appears after every cell swap on this model.
BIOS reporting poor battery health immediately after fitting the new cell
The 830 G11 BIOS reads health data from EEPROM registers on the battery's fuel gauge IC — not from live voltage measurements. When a new cell arrives, those registers don't yet reflect the actual cycle count and capacity of the fresh chemistry. The BIOS sees mismatched data and flags the battery as degraded before a single charge cycle completes. Running HP's built-in battery check after one full calibration cycle rewrites those registers against real measured data, and the health warning clears.
Laptop shutting down at 20–30% charge shown on screen
This happens because the fuel gauge IC hasn't yet mapped the new cell's voltage curve. The old cell had a gradual voltage slope the IC learned over many cycles — the new cell drops voltage faster under combined CPU and display load, hitting the low-voltage cutoff while the OS still shows 20–30% remaining. It's a calibration gap, not a faulty cell. Run two full discharge-to-hibernate cycles and the fuel gauge IC recalibrates its cutoff threshold to the new cell's actual curve — shutdowns stop occurring above 10%.