BTI L20M4P75-BTI 15.52V 90.1Wh Li-ion Battery

The BTI L20M4P75-BTI 15.52V 90.1Wh Li-ion Battery is a purpose-built replacement power solution for Lenovo ThinkPad P1 Gen 4 notebooks and the X1 Extreme Gen 4 family. This four-cell, high-energy-density battery delivers substantial runtime without compromising the sleek profile of modern ThinkPad laptops. Engineered to mirror OEM electrical specifications, it provides stable voltage, consistent discharge characteristics, and reliable performance across demanding workloads—from data analytics and software development to video editing and CAD design. Designed with safety as a core priority, the BTI battery features smart protection against overcharge, short circuits, and thermal events, helping protect your device and your data during daily use and long flights alike. The compact 4-cell configuration preserves your laptop’s thin form factor while still delivering extended operation between charges, making it an ideal upgrade for professionals who rely on uninterrupted productivity on the go. Built to withstand the rigors of daily use, this battery undergoes meticulous quality checks and uses durable Li-ion cells to ensure dependable cycle life and consistent power delivery over time. Whether you’re replacing an aging battery or stocking a spare power source for fieldwork, the BTI L20M4P75-BTI is crafted to deliver reliable energy, dependable safety features, and seamless compatibility with ThinkPad charging systems, helping you stay connected and productive wherever work takes you.

• Long-lasting power for demanding work — With a robust 90.1Wh capacity and optimized cell chemistry, this BTI replacement battery enables hours of productive use on a single charge. Whether you’re coding, running virtual machines, editing 4K video, or performing complex data analysis, you’ll experience extended runtimes and steadier performance across the battery’s lifecycle, reducing downtime and recharging breaks during critical projects.
• Advanced safety and reliability — Four high-quality Li-ion cells integrate built-in protection such as overcharge, short-circuit, and thermal safeguards. These safety mechanisms help shield the laptop’s delicate power management system, minimize the risk of unexpected shutdowns, and preserve battery health through many charging cycles—so you can focus on your work with confidence.
• Designed for Lenovo ThinkPad P1 Gen 4 and X1 Extreme Gen 4 — This replacement battery is precisely engineered to fit ThinkPad P1 Gen 4 configurations and X1 Extreme Gen 4 models (including 20Y5/20Y6). Its connectors and dimensions are matched to ensure a secure, snug fit and reliable electrical contact, supporting dependable performance in both standard and high-demand operating scenarios.
• Fast, simple installation and compatibility — The BTI L20M4P75-BTI is built for a straightforward plug-and-play upgrade. With a similar form factor to the original, the process requires minimal tools and downtime. IT teams and individuals alike can swap batteries quickly, enabling rapid resumption of work without complicated procedures or special equipment.
• Quality you can trust — BTI combines stringent quality control with quality-grade materials to ensure stable voltage delivery and long cycle life. The four-cell design optimizes weight and runtime, while the 15.52V rating aligns with ThinkPad power management to sustain performance under heavy workloads and high-performance tasks.

Technical Details of BTI L20M4P75-BTI 15.52V 90.1Wh Li-ion Battery

• Model: BTI L20M4P75-BTI
• Battery Type: Li-ion (Lithium-ion)
• Voltage: 15.52V
• Capacity: 90.1Wh
• Cells: 4-cell
• Compatibility: Lenovo ThinkPad P1 Gen 4, ThinkPad P1 Gen 4 20Y3/20Y4, X1 Extreme Gen 4 (20Y5/20Y6)
• Form Factor: Replacement notebook battery with fitted connectors
• Safety Features: Overcharge protection, short-circuit protection, thermal protection

How to Install BTI L20M4P75-BTI 15.52V Li-ion Battery

• Power down your Lenovo ThinkPad and unplug all accessories. Close the lid and place the device on a clean, static-free surface to prevent static damage.
• Flip the laptop over and remove the bottom access panel using the appropriate screwdriver. Keep screws organized and refer to the device’s service manual if needed to locate the battery cavity securely.
• Carefully disconnect the old battery connector from the motherboard. If there is resistance, verify that all fasteners and brackets are fully removed and that you are not pinching any cables during removal.
• Align the BTI L20M4P75-BTI battery with the chassis so the connectors line up precisely with the motherboard port. Gently press to seat the battery and ensure the connector is firmly attached before proceeding.
• Reattach the bottom cover and secure the screws. Reconnect the charger, power on the laptop, and allow the battery to calibrate through a full cycle. If your system suggests a calibration or battery health check, follow the on-screen instructions to optimize performance.

Frequently asked questions

• Q: Is this battery compatible with Lenovo ThinkPad P1 Gen 4 and X1 Extreme Gen 4?

  A: Yes. The BTI L20M4P75-BTI is designed to fit Lenovo ThinkPad P1 Gen 4 and X1 Extreme Gen 4 configurations, with the correct connectors and size to ensure a secure fit and reliable power delivery.

• Q: What is the capacity and voltage?

  A: It provides 90.1Wh of energy at 15.52V, delivering extended runtimes while remaining within typical ThinkPad power management tolerances.

• Q: Is the battery safe and reliable?

  A: The battery includes built-in safety protections such as overcharge, short-circuit, and thermal safeguards to protect both the battery and the laptop during operation and charging.

• Q: How do I know if this battery is the right replacement?

  A: Check your ThinkPad’s model number and battery part requirements. This BTI model is specifically listed for P1 Gen 4 and X1 Extreme Gen 4 families, offering a plug-and-play upgrade path for compatible devices.