About this replacement
HP Stream 11 Series — 11.4V Li-Polymer Replacement Battery (PS03XL)
This is an 11.4V, 3700mAh (42.18Wh) Li-Polymer battery for the HP Stream 11 notebook. It fits the Stream 11-R010NR, Stream 11-R050SA, Stream 11-R000NG, and over 48 other Stream 11 variants. OEM part numbers include PS03XL, HSTNN-DB6R, and 787520-005.
- Stream 11 platform fit: All Stream 11 variants on this list share the same 11.4V three-cell Li-Polymer architecture, identical connector pinout, and the same BMS handshake protocol. Swapping within this family does not require firmware changes or hardware modification.
- Bench tested on actual hardware: We ran this cell on a Stream 11-R010NR unit. The BMS completed the handshake, charge current stepped correctly through CC and CV phases, and the protection circuit triggered cleanly at the low-voltage cutoff threshold without nuisance trips.
- Post-install calibration on the Stream 11: After fitting this battery, let the laptop discharge fully until it hibernates on its own — do not force a shutdown. Then charge uninterrupted to 100%. This resets the BIOS battery learn cycle and clears the false "poor health" warning that appears after every cell swap on this platform.
Why the Stream 11 shuts down at 20–30% after a battery swap
The Stream 11's BIOS fuel gauge IC builds a discharge curve against the old cell over hundreds of cycles. When a new cell goes in, that stored curve no longer matches the actual voltage profile of the fresh chemistry. Under combined CPU and display load, the system hits a voltage point it interprets as near-empty — even though the cell has charge remaining. Running two or three full discharge-to-hibernate and uninterrupted-charge cycles forces the fuel gauge IC to recalibrate against the new cell's actual curve. After calibration, the cutoff point tracks accurately again.
BIOS reporting battery Wh as incorrect after fitting a new cell
The Wh value shown in BIOS comes from EEPROM data embedded in the battery's communication circuit — not from a live measurement of the cell. Some Stream 11 replacement cells carry EEPROM values written at manufacture that differ slightly from the actual chemistry rating. If BIOS shows a Wh figure that does not match the 42.18Wh spec on this listing, that is an EEPROM read, not a cell fault. The cell's actual charge capacity is unaffected. Confirm the discrepancy by checking the rated label on the battery directly and cross-referencing against the 42.18Wh figure in the product data.