BTI Battery for Notebook — 3900 mAh / 45 Wh Li-Ion Replacement Battery

The BTI Battery for Notebook is a dependable, rechargeable power solution designed to restore peak performance for your portable computer. Engineered to deliver consistent energy with a 3900 mAh capacity and 45 Wh of power at a nominal 11.55 V, this Li-Ion battery provides reliable run-time and a trusted replacement option for notebooks that use a proprietary battery size. Built with safety and durability in mind, the BTI Battery combines OEM-like performance with straightforward installation, giving you the freedom to work, study, or stream on the go without worrying about power interruptions.

• Extended run-time with a 3900 mAh capacity and 45 Wh of energy, allowing longer unplugged usage between charges for work, travel, or study sessions.
• 11.55 V lithium-ion (Li-Ion) chemistry delivers stable power delivery, efficient charging, and a robust cycle life to support daily notebook use.
• Proprietary battery size ensures a precise fit for supported notebook models, providing secure seating in the chassis and reliable contact with the power circuitry.
• Safety-focused rechargeable design includes built-in protection features to help prevent overcharge, short-circuit, and overheating, safeguarding your device and data.
• Easy, no-fuss replacement that mirrors OEM performance, enabling quick swaps during travel or at the desk with minimal downtime.

Technical Details of BTI Battery

• Battery type: Notebook battery
• Chemistry: Li-Ion (Lithium Ion)
• Nominal voltage: 11.55 V
• Capacity: 3900 mAh (3.9 Ah)
• Energy: 45 Wh
• Form factor / size: Proprietary battery size
• Rechargeable: Yes
• Designed for: Notebooks requiring a proprietary-size battery (replacement option)
• Safety features: Overcharge protection, short-circuit protection, thermal protection

How to Install BTI Battery

• Power down your notebook completely and unplug the charger. Save work and close all applications before removing the battery.
• Prepare a clean, flat workspace and turn the device over to access the bottom panel or battery compartment. Use the appropriate screwdriver to remove the screws securing the back cover and set the cover aside.
• Locate the existing battery and the battery connector. Carefully disconnect the battery connector from the motherboard or power interface, pulling by the connector housing rather than the wires to avoid damage.
• Remove the old battery from its bay. Note the orientation and any securing brackets or hooks, so you can replicate the fit with the BTI Battery.
• Gently place the BTI Battery into the bay, aligning it with mounting points and connectors. Reconnect the battery cable to the motherboard, ensuring a snug, secure connection.
• Reinstall any brackets or screws, snap the back cover into place, and tighten screws securely without overtightening. Power on the notebook to verify it starts normally and recognizes the new battery.
• Charge the BTI Battery to 100% before first use. If your notebook offers a battery calibration option, follow the manufacturer’s guidance to calibrate the new pack for accurate charge reporting.
• Monitor battery performance over the next few charging cycles. If you notice unusual heat, rapid discharge, or the device fails to recognize the battery, consult technical support or verify compatibility with your model.

Frequently asked questions

• Q: Is this battery compatible with my notebook?

  A: The BTI Battery is designed for notebooks that require a proprietary-size Li-Ion battery with a nominal 11.55 V rating. To ensure compatibility, confirm your device’s battery voltage, capacity (around 3900 mAh), and the proprietary form factor from your notebook’s manual or manufacturer specifications. If your model matches these parameters, the BTI Battery should be a suitable replacement.

• Q: How long will the BTI Battery last on a single charge?

  A: Run-time depends on your notebook usage, screen brightness, running applications, and wireless activity. With a 45 Wh energy capacity, you can expect longer unplugged sessions compared to lower-capacity packs, especially during light workloads. For demanding tasks like video editing or gaming, expect shorter intervals between charges. Always consider your typical daily usage when estimating real-world performance.

• Q: Is the BTI Battery safe to use?

  A: Yes. The BTI Battery employs Li-Ion chemistry paired with protective features such as overcharge, short-circuit, and thermal protection. When used as a replacement in compatible notebooks and charged with an appropriate power adapter, it offers safe operation and consistent power delivery. Always follow the installation guidance and use the correct charger supplied by your notebook manufacturer or BTI recommendations.

• Q: How do I know when it’s time to replace the battery?

  A: If you notice significantly reduced runtime, the battery won’t hold a charge, or the device reports a degraded battery health in BIOS or operating system power settings, it may be time to replace. A sudden drop in performance after a charge or uncomfortable swelling are warning signs—if observed, discontinue use and seek assistance.

• Q: How should I care for and store the BTI Battery when not in use?

  A: Store the battery in a cool, dry place away from direct sunlight. For long-term storage, aim to keep the charge around 40–60% to preserve cell longevity, and avoid exposing the battery to extreme temperatures. When not installed, check periodically for any changes in performance and re-calibrate if your device recommends it.