Laptop Battery for ASUS S5100U/UQ S510U S510UA/UN/UR B31N1637, 11.4V 38Wh, High Capacity 4200mAh, 2-Year Warranty

**Product Overview**
Upgrade your ASUS laptop with this premium replacement battery designed specifically for the S5100U, S5100UQ, S510U, S510UA, S510UN, and S510UR series. Whether your original battery no longer holds a charge, drains quickly, or causes unexpected shutdowns, this high-performance 11.4V 38Wh Li-ion battery restores your laptops portability and productivity.

**Important Voltage Warning**
Please verify that your original battery voltage is 11.4V. This battery is NOT compatible with 7.6V, 11.1V, or 14.8V models. Using an incorrect voltage battery may damage your laptop or cause safety hazards. Always check the voltage printed on your original battery before purchasing.

**Compatible ASUS Laptop Models**
- ASUS S5100U
- ASUS S5100UQ
- ASUS S510U
- ASUS S510UA
- ASUS S510UN
- ASUS S510UR

**Replaces Original Part Numbers**
- B31N1637
- B31N1637-1
- B31N1637-2

**Specifications Table**

| Specification | Detail |
|---------------|--------|
| Battery Type | Li-ion (Lithium-ion) |
| Voltage | 11.4V |
| Capacity | 4200mAh / 38Wh |
| Cell Count | 3 cells |
| Color | Black |
| Weight | Approx. 250g |
| Dimensions | 270 x 60 x 5.5 mm (Please measure your original battery for exact fit) |
| Certification | CE, FCC, RoHS |

**Comparison Table: Original vs. Replacement**

| Feature | Original ASUS Battery | Our Replacement Battery |
|---------|----------------------|------------------------|
| Voltage | 11.4V | 11.4V (Exact Match) |
| Capacity | 38Wh / 4200mAh | 38Wh / 4200mAh (Same or Higher) |
| Safety Protection | Standard | Multi-layer protection (overcharge, short circuit, etc. ) |
| 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 panel screws (Phillips #0 screwdriver recommended).
3. Carefully disconnect the old battery connector from the motherboard.
4. Remove the old battery and insert the new one, ensuring the connector clicks firmly.
5. Replace the bottom panel and screws.
6. Charge the new battery to 100% before first use for optimal performance.

**Safety & Quality**
Each battery undergoes rigorous testing for capacity, voltage stability, and safety. We use Grade A cells to ensure long cycle life (500+ charge cycles) and consistent performance. If you encounter any issues, our dedicated support team is ready to assist within 24 hours.

**Package Includes**
- 1 x Replacement Battery
-
- 1 x Installation Guide

**Note**
This is a compatible third-party replacement battery, not an original ASUS product. Please confirm your laptop model and original battery part number before ordering.