Laptop Battery for Dell Inspiron 14R 15R 3421 5421 5437 3521 5537 XCMRD MR90Y 11.1V 5200mAh 6-Cell Li-ion [2-Year Warranty]

**Product Overview**
This high-performance replacement battery is specifically designed for Dell Inspiron 14R, 15R, and select 3000/5000 series laptops. It replaces original part numbers MR90Y and XCMRD, delivering the same voltage ( 11.1V ) and a generous 5200mAh capacity for extended usage between charges.

** Important Voltage Warning**
Please confirm your original battery voltage is ** 11.1V ** before purchasing. This battery is NOT compatible with 14.8V or 7.4V systems. Using an incorrect voltage may damage your device or cause safety hazards.

**Compatible Laptop Models**
- Dell Inspiron 14R (3421, 5421, 5437)
- Dell Inspiron 15R (3521, 5537)
- Dell Inspiron 15 (3521, 5537)
- Also fits: Dell Vostro 2521, 2520 (check voltage first)

**Compatible Original Part Numbers**
MR90Y, XCMRD, 0MR90Y, 0XCMRD, 6GTP1, 8F0T6, C2GTP, F3R9F, H7F9M, J6T9R, P36G, P37G, P38G, P39G

**Specifications Table**
| Parameter | Value |
|-----------|-------|
| Battery Type | Li-ion (Lithium-ion) |
| Voltage | 11.1V |
| Capacity | 5200mAh / 57.72W h |
| Cells | 6 Cells |
| Color | Black |
| Weight | Approx. 320g |
| Certification | CE, FCC, RoHS |

**Comparison Table: Original vs Replacement**
| Feature | Original Dell Battery | Our Replacement |
|---------|----------------------|----------------|
| Capacity | 4800mAh (typical) | 5200mAh (higher) |
| Warranty | 1 year | 2 years |
| Price | High | Affordable |
| Safety Protection | Standard | Enhanced IC + multi-protection |

**Installation Tips**
1. Power off your laptop and unplug the AC adapter.
2. Remove the old battery by sliding the release latch.
3. Insert the new battery until it clicks into place.
4. Charge fully before first use (about 4-5 hours).
5. For optimal lifespan, avoid complete discharge; recharge when battery level drops to 20%.

**Package Includes**
- 1x Replacement Battery


**Customer Support**
We stand behind our product. If you encounter any compatibility or performance issues, please contact us immediately. We offer a 30-day money-back guarantee and a full 2-year warranty.

**Note: ** This is a third-party replacement, not an original Dell product. Dell is a registered trademark of Dell Inc.