DGFTB PA5278U-1BRS
DGFTB PA5278U-1BRS Laptop Battery User Manual
Replacement Battery for Toshiba Tecra X40 and Portege X30 Series
1. Produit terminéview
The DGFTB PA5278U-1BRS is a high-quality replacement Li-ion battery designed for specific Toshiba and Dynabook laptop models. This manual provides essential information for safe and effective use, installation, and maintenance.

Image: DGFTB PA5278U-1BRS laptop battery with its retail packaging, highlighting quality and service.
- Type de batterie : Li-ion
- Voltage: 11.4V
- Capacité: 48 Wh / 4080 mAh
- Numéros de pièces compatibles : PA5278U-1BRS, PT28U-0LN03X, PT274U-01N001

Image : Gros plan view of the battery's label, showing model number, voltage, et la capacité.
2. Compatible Laptop Models
This battery is compatible with a wide range of Toshiba and Dynabook laptop models. Please verify your laptop's model number against the list below to ensure compatibility.
For TOSHIBA Portege X30 Series:
- Portege X30-D
- Portege X30-D-10L, Portege X30-D-10M
- Portege X30-E
- Portege X30-E-10G, Portege X30-E-10U
- Portege X30-F-15U, Portege X30-F1352
For TOSHIBA Tecra X40 Series:
- Tecra X40-D
- Tecra X40-D-10E
- Tecra X40-E-013, Tecra X40-E-108
- Tecra X40-F, Tecra X40-F-10D
For DYNABOOK Portege X30-F Series:
- Portege X30-F-10L, Portege X30-F-10N
3. Features and Quality Assurance
The DGFTB battery is engineered with high-quality components to ensure reliable performance and safety.
- Cellules de catégorie A : Utilizes high-quality cells to minimize the risk of battery leakage and ensure stable power output.
- Built-in Circuit Protection: Integrated protection mechanisms enhance safety during use and extend the battery's lifespan.
- Gold-plated Connector: Features a gold-plated connector for durable and stable output.
- Position précise du trou : Designed with precise hole positions for secure fitting.
- Matériaux durables : Constructed with composite materials, high temperature resistance, and corrosion resistance.

Image: Diagram illustrating the quality assurance features including over-heat protection, over-charge protection, premium microchip, and Class A protection.

Image: Illustration of the battery's internal components (main chip, protection chip, resistance, temperature sensing, conductor copper sheet) and benefits such as fast charging, stable output, longer discharge time, low power consumption, and over 500 discharge cycles.
4. Guide d'installation
Initial Installation and Calibration:
- Préparation: Before beginning, ensure your laptop is powered off and disconnected from any power source. It is recommended to wear anti-static gloves to prevent damage from static electricity.
- Accès au compartiment de la batterie : Carefully open your laptop's back panel or battery compartment. Refer to your laptop's specific service manual for detailed instructions on accessing the battery.
- Retirer l'ancienne batterie : Disconnect the old battery's connector from the motherboard. Unscrew any retaining screws and gently lift the old battery out.
- Installez une nouvelle batterie : Place the new DGFTB battery into the compartment, ensuring it aligns correctly with the mounting points. Secure it with any screws removed earlier.
- Connectez la batterie : Reconnect the battery's cable firmly to the motherboard. Ensure the interface is fully connected.
- Réassembler l'ordinateur portable : Carefully close and secure the laptop's back panel.
- Initial Calibration (Important):
- After installation, connect the AC adapter and fully charge the battery to 100%.
- Once fully charged, disconnect the AC adapter and use the laptop on battery power until the battery discharges to 5% (do not let it discharge to 0% and shut down).
- Reconnect the AC adapter and charge the battery to 95%.
- Repeat this discharge-charge cycle 3-4 times to calibrate the new battery and optimize its performance.

Image: Visual representation of a laptop battery being installed, with various screwdrivers shown, indicating the need for tools.


Image : détaillée views of the battery's gold-plated connector and a fixed position mounting point, emphasizing precise design for secure installation.
5. Finding Your Laptop Model
To ensure you have the correct battery or for troubleshooting, it's important to know your laptop's exact model number. Here's how to find it on Windows:
- Étape 1 : Appuyez sur le Touche Windows + R simultaneously to open the Run dialog box.
- Étape 2 : Dans la boîte de dialogue Exécuter, saisissez msinfo32 et cliquez OK. This will open the System Information window.
- Étape 3 : In the System Information window, locate the "System Model" entry. The value next to it is your laptop's model number.

Image: Step-by-step visual guide on how to find your laptop's model number using the 'msinfo32' command in Windows.
6. Maintenance et entretien
Proper care can extend the life and performance of your DGFTB laptop battery:
- Étalonnage régulier : Perform the discharge-charge calibration cycle (as described in Section 4) every 2-3 months to maintain battery accuracy.
- Évitez les températures extrêmes : Do not expose the battery to extreme heat or cold. Optimal operating temperature is between 10°C and 35°C (50°F and 95°F).
- Stockage: If storing the battery for an extended period, charge it to about 50-60% and store it in a cool, dry place. Recharge it to 50-60% every few months.
- Éviter la décharge complète : Do not consistently drain the battery to 0%. This can reduce its lifespan.
- Contacts propres : Periodically clean the battery contacts with a dry cloth to ensure good connection.
7. Dépannage
Si vous rencontrez des problèmes avec votre nouvelle batterie, voici quelques solutions courantes à considérer :
| Problème | Cause possible | Solution |
|---|---|---|
| Battery not recognized/charging | Loose connection, driver issue, or initial calibration needed. |
|
| Durée de vie de la batterie courte | Improper calibration, high power consumption settings, or background applications. |
|
| Indicateur de batterie inexact | Battery not calibrated. | Perform battery calibration (Section 4). |
If issues persist after trying these steps, please contact DGFTB customer support.
8. Spécifications
| Attribut | Détail |
|---|---|
| Marque | DGFTB |
| Numéro de modèle | PA5278U-1BRS (also X3PH0) |
| Type de batterie | Lithium-ion (Li-ion) |
| Voltage | 11.4V |
| Capacité | 48 Wh / 4080 mAh |
| Poids de l'article | 13.6 onces |
| Dimensions du colis | 13.6 x 4.3 x 1 pouces |
| Fabricant | Foshan Eurasia Energy Technology Co., Ltd. |
| Date de première disponibilité | 1 novembre 2023 |
9. Garantie et assistance
DGFTB stands behind the quality of its products. This battery comes with a 12-month reset warranty.
- Période de garantie : 12 mois
- Service client: 24/7 hours customer service is available for any inquiries or support needs.
For technical assistance, warranty claims, or any other questions, please contact DGFTB customer support through the platform where you purchased the product or visit the official DGFTB store page on Amazon:
Visit the DGFTB Store on Amazon


Image: Visuals indicating available customer support and a channel for questions.
10. Application du produit
The DGFTB PA5278U-1BRS battery is designed to provide reliable power for your compatible laptop, supporting various daily activities:

Image: Depicts the battery's suitability for various uses such as entertainment (gaming), office work, and leisure activities.
- Divertissement: Enjoy movies, games, and multimedia content without constant power connection.
- Travail de bureau : Maintain productivity during meetings, commutes, or when working remotely.
- Loisirs: Parcourir le web, read, or connect with friends and family on the go.