BTI TA03XL-BTI 11.55V 51Wh Li-Ion Battery – 1FN06AA / TA03XL Compatibility

The BTI TA03XL-BTI 11.55V 51Wh Li-Ion Battery is a high-performance replacement designed to restore full power to a wide range of HP business laptops and workstations. Engineered to match OEM specifications and built with quality Li-ion cells, this battery delivers reliable runtime for EliteBook and ZBook series, MT43 Mobile Thin Client, and related models. With compatibility spanning multiple model numbers including 1FN06AA, TA03XL, 854047-1C1, 854108-850, and TA03051XL-PL, it provides a seamless, plug-and-play option for professionals who rely on long hours of uninterrupted productivity.

• Extended runtime for demanding workdays: A 51Wh capacity delivers substantial charge to power productivity without constant recharges, helping you stay productive on the go.
• Broad compatibility with HP business devices: Fully tested compatibility with EliteBook 745 G4, 755 G4, 840 G4, 850 G4, MT43 Mobile Thin Client, and ZBook 14U G4 / 15U G4 ensures fewer compatibility concerns when replacing the original battery.
• OEM-aligned performance and safety: The BTI TA03XL-BTI battery mirrors OEM electrical characteristics and includes built-in safety features to protect against overcharge, short circuit, and excessive temperature, promoting safer operation.
• Reliable energy delivery: Precision-engineered cells and circuitry optimize voltage stability and energy delivery, delivering consistent performance across a wide range of workloads and temperatures.
• Effortless replacement and longevity: Designed for straightforward installation and long service life, this replacement solution minimizes downtime and helps extend the usable life of your device.

Technical Details of BTI TA03XL-BTI 11.55V 51Wh Li-Ion Battery

• Voltage: 11.55V
• Capacity: 51Wh
• Chemistry: Li-Ion
• OEM Compatibility (reference codes): 1FN06AA, TA03XL, 854047-1C1, 854108-850, TA03051XL-PL
• Compatible Models: HP EliteBook 745 G4, EliteBook 755 G4, EliteBook 840 G4, EliteBook 850 G4, MT43 Mobile Thin Client, ZBook 14U G4, ZBook 15U G4
• Form factor: Replacement lithium-ion battery designed to meet or exceed OEM specifications
• Safety and compliance: Built-in protection against overcharge, over-discharge, short circuit, and thermal runaway for additional peace of mind

how to install BTI TA03XL-BTI 11.55V 51Wh Li-Ion Battery

Installing the BTI TA03XL-BTI battery is straightforward and can be completed with standard repair tools. Follow these general steps to replace your battery safely and efficiently:

1) Power down the device and unplug all power adapters. Ensure the computer is completely off before you begin.
2) Place the device on a clean, flat surface and prepare a small container for screws. Use appropriate screwdrivers for your model, as HP devices often use Phillips or Torx hardware.
3) Remove the back cover or bottom panel to access the battery compartment. Depending on the model, you may need to remove keyboard or service panels—refer to your device’s service manual for exact instructions.
4) Disconnect the battery connector carefully. Use a plastic pry tool to gently release the connection to avoid damage to the motherboard or battery contacts.
5) Remove the old battery by unscrewing any mounting hardware or brackets holding it in place, then lift the battery out of the chassis.
6) Align the new BTI TA03XL-BTI battery into the slot and secure it with the original screws or brackets. Reconnect the battery connector firmly, ensuring a snug, even connection.
7) Reinstall the back cover or bottom panel and tighten screws to specification.
8) Reconnect the power adapter and power on the device to verify the battery is detected and charging correctly. If the device does not recognize the battery, reseat the connector and retry.

Note: For specific steps tailored to your exact model (EliteBook 745 G4, 755 G4, 840 G4, 850 G4, MT43, ZBook 14U G4, ZBook 15U G4), consult the official service manual or a professional technician. The general procedure above provides a safe framework for battery replacement and is applicable across the supported devices listed for this BTI battery.

Frequently asked questions

• Q: Is the BTI TA03XL-BTI battery compatible with my specific HP model?
• A: This replacement is designed to be compatible with a broad range of HP EliteBook and ZBook devices, including EliteBook 745 G4, 755 G4, 840 G4, 850 G4, MT43 Mobile Thin Client, and ZBook 14U G4 / 15U G4, using OEM references 1FN06AA, TA03XL, 854047-1C1, 854108-850, and TA03051XL-PL. If your device is listed, chances are good you can replace the battery with this BTI unit.
• Q: What is the capacity and voltage of this battery?
• A: The battery provides 11.55V and 51Wh of energy, delivering reliable power for extended work sessions without frequent recharging.
• Q: How does the battery ensure safety during operation?
• A: The BTI TA03XL-BTI includes built-in protection against overcharge, over-discharge, short circuits, and overheating, aligning with safety standards for Li-Ion replacements.
• Q: How long will this battery last on a full charge?
• A: Runtime varies with usage, settings, and efficiency of the device. Expect several hours of typical office tasks on a full charge, with longer life during light usage and reduced performance workloads. Real-world results depend on screen brightness, CPU activity, wireless usage, and background processes.
• Q: Is installation difficult for a non-professional?
• A: Replacement is straightforward but requires basic mechanical skills and care to avoid damaging internal components. If you’re unsure, seek professional service to ensure proper disassembly, contact reseating, and safe reassembly.
• Q: How should I dispose of an old battery?
• A: Do not discard in regular trash. Recycle the old battery through an approved electronics recycling program or an authorized service center to protect the environment and comply with local regulations.

In addition to compatibility and safety, this BTI battery is designed to deliver predictable performance across a range of professional workflows. Whether you’re developing software, handling large spreadsheets, conducting data analysis, or running design tools, the 11.55V 51Wh battery provides steadier power availability that helps you stay productive away from the desk. The precise electrical characteristics ensure smooth behavior with your HP EliteBook, MT43 Thin Client, or ZBook units, minimizing the risk of unexpected shutdowns and abrupt power loss during critical moments.

Choosing a replacement battery is about balancing capacity, reliability, and compatibility. The BTI TA03XL-BTI 51Wh Li-Ion battery is built to meet those criteria, offering a dependable solution that mirrors OEM performance while delivering the convenience of a straightforward replacement. By aligning with common OEM references and widely used HP device models, this battery reduces the hassle of hunting for a perfect match and provides a trusted option for professionals who demand continuity in their workday. Embrace the confidence that comes with a robust, well-supported replacement battery that keeps your devices powered where you need them most.