Laptop Battery for Dell DUO 1090, WW12P, TR2F1, 9YXN1 11.1V 4400mAh, High Capacity, 12-Month Warranty

**Product Overview**
Upgrade or replace your worn-out Dell DUO 1090 battery with this high-performance 11.1V 4400mAh replacement. Whether youre a student, professional, or home user, this battery delivers reliable power to keep your device running smoothly throughout the day.

**Important Voltage Warning**
Please verify that your original battery voltage is 11.1V before purchasing. Using an incorrect voltage may cause damage to your device. This battery is NOT compatible with 7.4V or 14.8V models.

**Compatible Models & Part Numbers**
This battery replaces the following Dell part numbers:
WW12P, TR2F1, 9YXN1, 0WW12P, 0TR2F1, 09YXN1

Compatible laptop models include:
Dell DUO 1090, Dell Inspiron DUO 1090, Dell DUO 1090 Series

**Battery Specifications**
- Type: Lithium-ion (Li-ion)
- Voltage: 11.1V
- Capacity: 4400mAh / 48.84W h
- Color: Black
- Cell Quality: Grade A, certified cells
- Protection: Overcharge, over-discharge, short circuit, and overheat protection
- Warranty: 12 months

**Comparison Table**

| Feature | Our Battery (4400mAh) | Standard OEM (approx. ) |
|---------|-----------------------|------------------------|
| Capacity | 4400mAh / 48.84W h | 4000mAh / 44.4W h (varies) |
| Cell Grade | Grade A | Standard |
| Cycle Life | 500+ cycles | 300-500 cycles |
| Warranty | 12 months | 6-12 months (varies) |

**Installation Tips**

1. Shut down your laptop and unplug the AC adapter.

2. Remove the battery from the bottom compartment (no tools required for most models).

3. Insert the new battery until it clicks into place.

4. Charge the battery fully before first use (about 3-4 hours).

5. For optimal lifespan, avoid complete discharge recharge when battery level drops below 20%.

**Package Includes**
- 1 x Replacement Battery for Dell DUO 1090


**Note: ** This is a third-party replacement product, not an OEM Dell item. Please confirm your laptop model and original battery part number before ordering. If you have any questions, feel free to contact us were here to help!