Battery for Dell G3 3790 3590 3779 G5 5587 5590 266J9 11.4V 42Wh 266J9 0X1Y6F 2-Year Warranty

**Product Overview**
This high-performance replacement battery is specifically designed for Dell G3 3590, G3 3790, G3 3779, G5 5587, G5 5590, and Precision M3800 series laptops. It replaces original part numbers 266J9, 0X1Y6F, and 0X1Y6F, providing a reliable power source for your daily tasks, gaming, or professional work.

**Important Voltage Warning**
Please check your original battery voltage before purchase. This battery is rated at 11.4V. If your original battery is 11.4V, this is a direct replacement. Do not use if your original battery is 7.6V or 15.2V, as incorrect voltage may damage your device.

**Compatible Laptop Models**
- Dell G3 3590
- Dell G3 3790
- Dell G3 3779
- Dell G5 5587
- Dell G5 5590
- Dell Precision M3800 (select configurations)
- Also compatible with Dell Inspiron 7577, 7567 (verify voltage first)

**Compatible Part Numbers**
266J9, 0X1Y6F, 0X1Y6F, 0X1Y6F, 0X1Y6F, 0X1Y6F

**Product Specifications**
| Specification |

Details

|
|---------------|---------|
| Battery Type | Li-ion |
| Voltage | 11.4V |
| Capacity | 42Wh |
| Cell Count | 3 cells |
| Color | Black |
| Weight | Approx. 250g |
| Dimensions | 270 x 60 x 20 mm |
| Warranty | 2 Years |

**Comparison Table**
| Feature | Our Battery | Generic Battery |
|----------|-------------|-----------------|
| Capacity | 42Wh (High) | 30-36Wh (Low) |
| Safety Circuits | Full protection | Basic or none |
| Compatibility | Exact fit for listed models | May require modification |
| Warranty | 2 Years | 6-12 months |
| Customer Support | 24/7 responsive | Limited |

**Installation Tips**
1. Power off your laptop and unplug the AC adapter.
2. Remove the bottom panel screws (refer to your laptop manual).
3. Gently disconnect the old battery cable and lift it out.
4. Insert the new battery, connect the cable, and secure the panel.
5. Charge the battery fully before first use for optimal performance.
6. If your laptop does not recognize the battery, try
a hard reset: disconnect AC, remove battery, hold power button for 15 seconds, then reconnect.

**Package Includes**
- 1x Replacement Battery
- (if applicable)


**Why Choose Us? **
We specialize in laptop batteries for Dell, HP, Lenovo, and more. Every battery undergoes strict quality testing to ensure safety and longevity. Our 2-year warranty and responsive customer service give you peace of mind. If you have any questions about compatibility, please message us before purchasing.

**Note: ** This is a third-party replacement battery, not an OEM product. It is fully compatible with the listed models and part numbers.