1. Introduction
This instruction manual provides essential information for the safe and effective use of your SANISI G91J0 3-Cell 11.25V 41Wh laptop battery. Please read this manual thoroughly before installation and operation to ensure optimal performance and safety. This battery is designed as a replacement for various Dell Latitude and Vostro laptop models.
2. Important Safety Information
Always follow these safety guidelines to prevent damage to the battery, your laptop, and to avoid personal injury.
- Disconnect Power: Always power off your laptop and disconnect it from the AC adapter before installing or removing the battery.
- Professional Installation Recommended: If you are unsure about the installation process, seek assistance from a qualified technician.
- Avoid Puncturing or Crushing: Do not puncture, drop, crush, or disassemble the battery. This can lead to internal short circuits, overheating, or fire.
- Temperature Limits: Do not expose the battery to extreme temperatures (above 65°C / 149°F or below 0°C / 32°F). Avoid direct sunlight or placing it near heat sources.
- Water and Moisture: Keep the battery away from water and high humidity.
- Proper Disposal: Do not dispose of the battery in household waste. Recycle it according to local regulations for lithium-ion batteries.
- Use Only with Compatible Devices: This battery is specifically designed for the listed Dell laptop models. Using it with incompatible devices may cause damage.
3. Compatible Laptop Models
The SANISI G91J0 3-Cell battery is compatible with a wide range of Dell Inspiron, Latitude, and Vostro laptops. It is crucial to verify your original battery's model number and cell count (3-Cell) before purchase and installation, as some laptop models may support multiple battery configurations (e.g., 3-Cell, 4-Cell).
Compatible Dell Inspiron Series:
- Inspiron 15: 3510, 3511, 3515, 3520, 3525, 3530, 3535
- Inspiron 13: 5310, 5320, 5330
- Inspiron 14: 5410, 5415, 5418, 5420, 5425, 5430, 5435
- Inspiron 14 Plus: 7420
- Inspiron 15: 5510, 5515, 5518
- Inspiron 16: 5625, 5630, 5635, 5640, 5645
- Inspiron 14 2-in-1: 5410, 7415, 7420, 7425, 7430, 7435
Compatible Dell Latitude Series:
- Latitude: 3320, 3330, 3420, 3520, 3530
Compatible Dell Vostro Series:
- Vostro 15: 3510, 3511, 3515, 3520, 3525
- Vostro 13: 5310, 5320
- Vostro 14: 3420, 3425, 5410, 5415
- Vostro 15: 5510, 5515
- Vostro 16: 5620, 5625, 5630, 5635, 5640
Note: There are different battery models (e.g., G91J0 41Wh 3-Cell, V6W33 54Wh 4-Cell, TN70C 64Wh 4-Cell) that may fit the same laptop chassis. The 3-Cell battery is typically shorter than the 4-Cell versions. Always open your laptop's back case to confirm your original battery's model and cell count before purchasing and installing a replacement.

Image: Comparison of a 3-Cell 41Wh G91J0 battery (top) and a 4-Cell 54Wh V6W33 battery (bottom). Note the difference in length and capacity. Ensure you select the correct battery type for your laptop.
4. Package Contents
Your package should contain the following item:
- 1 x SANISI G91J0 3-Cell 11.25V 41Wh Laptop Battery
5. Setup and Installation
Replacing a laptop battery requires careful handling of internal components. If you are not comfortable performing this procedure, please consult a professional technician.

Image: The SANISI G91J0 3-Cell 11.25V 41Wh laptop battery, showing its overall design and label with specifications.
Installation Steps:
- Prepare Your Laptop: Power off your Dell laptop completely. Disconnect the AC adapter and any peripheral devices.
- Discharge Residual Power: Press and hold the power button for 15-20 seconds to drain any residual power from the system.
- Open the Laptop Case: Carefully unscrew and remove the bottom cover of your laptop. Refer to your laptop's specific service manual for precise instructions on how to open the case.
- Locate the Old Battery: Identify the existing battery inside the laptop. It will typically be a rectangular component connected by a cable to the motherboard.
- Disconnect the Battery Cable: Gently disconnect the battery cable from the motherboard connector. Use a plastic pry tool if necessary to avoid damaging the connector.
- Remove Retaining Screws: Unscrew any screws that secure the battery to the laptop chassis. The G91J0 battery typically uses three M2x3 screws.
- Remove the Old Battery: Carefully lift and remove the old battery from its compartment.
- Install the New Battery: Place the new SANISI G91J0 battery into the compartment, ensuring it aligns correctly with the screw holes.
- Secure the New Battery: Reinsert and tighten the retaining screws to secure the new battery in place.
- Connect the Battery Cable: Reconnect the battery cable to the motherboard connector, ensuring it is fully seated.
- Close the Laptop Case: Replace the bottom cover of your laptop and secure it with the screws.
- Initial Charge: Connect the AC adapter and allow the battery to charge fully before its first use.

Image: An illustrative diagram showing the typical location of the battery within a Dell laptop, highlighting the three M2x3 screws (circled in red) and the battery connector (indicated by blue arrows) that need to be detached and reattached during installation.
6. Operating Instructions
First Use and Charging:
- Upon initial installation, connect your laptop to the AC adapter and charge the battery to 100%.
- For optimal battery calibration, it is recommended to fully discharge the battery (until the laptop shuts down) and then fully recharge it to 100% for the first few cycles.
General Usage:
- Avoid frequently running the battery down to 0% as this can reduce its lifespan.
- If you primarily use your laptop connected to an AC adapter, consider setting battery charge limits in your laptop's power management settings (if available) to prolong battery health.
- Avoid using the laptop in extremely hot environments, as high temperatures accelerate battery degradation.
7. Maintenance and Storage
Battery Care Tips:
- Avoid Full Discharges: Lithium-ion batteries benefit from partial discharges rather than full ones. Try to keep the charge level between 20% and 80%.
- Temperature Control: Operate your laptop in a cool, well-ventilated area. Excessive heat is detrimental to battery life.
- Clean Contacts: Periodically clean the battery contacts (if accessible) with a dry, lint-free cloth to ensure good connection.
Storage:
- If storing the battery for an extended period (more than a month), charge it to approximately 50% before removal.
- Store the battery in a cool, dry place, away from direct sunlight and extreme temperatures.
- Check the battery's charge level every few months and recharge to 50% if it drops significantly.
8. Troubleshooting
If you encounter issues with your SANISI G91J0 battery, try the following troubleshooting steps:
- Battery Not Charging:
- Ensure the AC adapter is properly connected to both the laptop and a working power outlet.
- Verify that the AC adapter is the correct one for your laptop and is functioning correctly.
- Check the battery cable connection inside the laptop.
- Try restarting your laptop.
- Short Battery Life:
- Calibrate the battery by fully discharging and recharging it a few times.
- Adjust your laptop's power settings to a more power-efficient mode.
- Close unnecessary applications running in the background.
- Reduce screen brightness.
- Battery Not Recognized:
- Power off the laptop, remove the battery, hold the power button for 15 seconds, then reinstall the battery and restart.
- Update your laptop's BIOS and battery drivers (check Dell's official support website for your specific model).
If these steps do not resolve the issue, please contact customer support.
9. Specifications
| Model Number | G91J0 |
| Battery Type | Lithium Polymer |
| Number of Cells | 3-Cell |
| Voltage | 11.25V |
| Capacity | 41Wh (3467mAh) |
| Item Weight | 7.8 ounces |
| Package Dimensions | 10.51 x 4.8 x 1.38 inches |
| Manufacturer | Dongguan jIATaIYuAn electronics Co., Ltd |
10. Warranty and Support
Warranty Information:
This SANISI G91J0 battery comes with a warranty that includes a full refund within 30 days of purchase and free replacement within 12 months for manufacturing defects.
Customer Support:
For any questions, technical assistance, or warranty claims, please contact SANISI PARTS directly through your purchase platform. Provide your order number and a detailed description of the issue for prompt service.