Laptop Battery for HP MB04XL HSTNN-UB6X 844204-850 843538-541 11.55V 41.7Wh 4-Cell Li-ion Compatible with HP Spectre x360 13-4100 Series 2-Year Warranty

**Product Overview**
Upgrade or replace your worn-out HP Spectre x360 battery with this premium 11.55V 41.7W h 4-cell Li-ion replacement. Designed specifically for the HP Spectre x360 13-4100 series, it offers a perfect fit and reliable power restoration. Whether your original battery no longer holds a charge, drains quickly, or causes unexpected shutdowns, this battery brings your laptop back to full mobility.

**Important Voltage Warning**
Please check your original battery voltage before purchasing. This battery is designed for 11.55V (also compatible with 11.4V systems). Using a battery with incorrect voltage may lead to charging issues or permanent damage to your laptop. If your original battery is 7.6V or 14.8V, this product will NOT work.

**Compatible Models & Part Numbers**
This battery replaces the following OEM part numbers:
- MB04XL
- HSTNN-UB6X
- 844204-850
- 843538-541
- HSTNN-LB6X
- 844204-001

Compatible Laptop Models (including but not limited to):
- HP Spectre x360 13-4100 Series
- HP Spectre x360 13-4110nr
- HP Spectre x360 13-4120nr
- HP Spectre x360 13-4130nr
- HP Spectre x360 13-4190nr
- HP Spectre x360 13-4101dx
- HP Spectre x360 13-4102dx
- HP Spectre x360 13-4103dx

**Specifications Table**
| Parameter | Value |
|-----------|-------|
| Battery Type | Li-ion |
| Voltage | 11.55V (Compatible with 11.4V ) |
| Capacity | 41.7W h / 3650mAh |
| Cells | 4-Cell |
| Color | Black |
| Weight | Approx. 200g |
| Warranty | 2 Years |

**Comparison Table: Original vs. Replacement**
| Feature | Original HP Battery | Our Replacement |
|---------|-------------------|----------------|
| Voltage | 11.55V | 11.55V ( 11.4V compatible) |
| Capacity | 41.7W h | 41.7W h |
| Cell Quality | OEM Grade | Grade A+ Cells |
| Safety Certifications | Yes | UL/CE/RoHS |
| Warranty | 1 Year (typical) | 2 Years |
| Price | High | Affordable |

**Installation Tips**
1. Power off your laptop and unplug the AC adapter.
2. Remove the bottom cover (screws may vary by model; use a proper screwdriver).
3. Disconnect the old battery cable from the motherboard.
4. Remove the old battery and insert the new one.
5. Reconnect the cable, replace the cover, and power on.
6. For first use, charge to 100% and then discharge to 10% for optimal calibration.

**Package Includes**
- 1x Replacement Battery ( 11.55V 41.7W h)
- (if applicable)


**Customer Support**
We stand behind our product with a 2-year warranty and friendly customer service. If you have any questions about compatibility or installation, please contact us were happy to help!