About this replacement
HP Presario B3000 Series — 11.1V Li-ion Replacement Battery (375942-001)
This 11.1V, 4400mAh (48.84Wh) Li-ion battery replaces the original pack in the HP Presario B3000 and B3800 series notebooks. It covers OEM part numbers 375942-001, 375974-001, HSTNN-A10C, APBT01A, APBT01B, APBT01C, M62044L, and W62144L. The connector, BMS handshake, and cell configuration match the factory specification for this platform.
- B3000 and B3800 platform compatibility: All models in this cluster — B3800 CTO, B3801, B3801AP and the broader B3000 family — share the same 11.1V three-cell rail and use an identical connector pinout and BMS communication protocol, which is why one part number covers the full range.
- Bench tested on actual hardware: We ran this cell through a full charge and load cycle on the B3800 platform. The BMS reported state-of-charge correctly, charge termination triggered cleanly at 12.6V, and the BIOS accepted the pack without a hardware fault flag.
- First-cycle calibration on the B3000: After installing, run the notebook on battery until it hibernates from low charge, then charge uninterrupted to 100% without interruption. This forces the fuel gauge IC to map its discharge curve against the new cells and clears the inaccurate health warning the BIOS logs after every pack swap.
BIOS reporting battery health as poor immediately after fitting the new pack
The HP Presario BIOS reads health status from EEPROM data written by the previous cell's charge controller. When a new pack is fitted, that EEPROM history does not match the fresh cell, so the BIOS flags it as degraded. This is not a fault with the replacement battery. Running one complete discharge-to-hibernate followed by a full uninterrupted charge resets the learn cycle. After two or three full cycles the BIOS health indicator will update to reflect the actual cell condition.
Laptop shuts down abruptly at 20–30% charge shown on screen
This happens when the cell voltage drops below the BMS cutoff threshold under combined CPU and display load before the fuel gauge IC expects it to. The fuel gauge is calibrated against the old cell's discharge curve, so its percentage reading and the actual voltage no longer match. The pack hits roughly 9.9V under load and the BMS cuts power while the OS still shows charge remaining. Run two full discharge-to-hibernate and full recharge cycles — the fuel gauge IC will recalibrate its curve against the new cells and the early shutdowns will stop.