SKU: 43961779098

BTI44Wh ThinkPad Battery Replacement For T550 T560 W550

Sale price$111.24 Regular price$123.60
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Description

BTI44Wh ThinkPad Battery Replacement For T550 T560 W550Keep your ThinkPad running longer between charges with the BTI Battery, a premium drop in replacement designed for popular Lenovo models. This 44 Wh Lithium Ion (Li Ion) battery delivers dependable power for ThinkPad T550, T550S, T560, W550, and W550S laptops, using OEM compatible dimensions and a proprietary size that ensures a tight, secure fit. Built to mirror the performance and reliability of the original battery, the BTI Battery is ideal for

Keep your ThinkPad running longer between charges with the BTI Battery, a premium drop-in replacement designed for popular Lenovo models. This 44 Wh Lithium Ion (Li-Ion) battery delivers dependable power for ThinkPad T550, T550S, T560, W550, and W550S laptops, using OEM-compatible dimensions and a proprietary size that ensures a tight, secure fit. Built to mirror the performance and reliability of the original battery, the BTI Battery is ideal for traveling professionals, students, and power users who demand consistent uptime without compromising safety or compatibility.

  • Seamless compatibility and precise fit: Engineered as a direct replacement for the Lenovo OEM parts 45N1743, 45N1742, 45N1741, and 45N1740, this BTI Battery slides into the battery bay of ThinkPad T550, T550S, T560, W550, and W550S with no modification required. It delivers the same connector interface and discharge characteristics, ensuring dependable performance and plug-and-play convenience for busy users who value efficiency and reliability.
  • High-capacity power for extended use: With a 44 Wh energy rating, the BTI Battery provides longer runtime between charges, helping you stay productive through longer work sessions, flights, or classroom days. This capacity is especially beneficial for professionals who run multiple applications, streams, or data-heavy tasks, reducing the need for frequent recharges during critical moments.
  • Advanced Li-Ion chemistry for steady performance: Built on Lithium Ion (Li-Ion) chemistry, this battery delivers consistent voltage delivery and stable energy output over its cycle life. Li-Ion cells are known for low self-discharge, reliable performance at varying temperatures, and a practical balance between weight and energy density—ideal for ultraportable ThinkPad configurations used in everyday business, education, and personal computing tasks.
  • Proprietary size for secure installation: The BTI Battery uses a proprietary battery size that’s tailored to the ThinkPad battery compartment, providing a snug, secure fit and dependable contact with the motherboard. This design minimizes wobble, prevents loose connections, and ensures safe operation during travel or impact, so you can rely on steady performance in daily use or on the move.
  • Safety-focused design and reliability: Built with protective features intended to guard against common battery issues—overcharge, short-circuit, and thermal risks—the BTI Battery helps protect both the battery and your laptop. With high-quality cells and careful engineering, this replacement battery supports safe charging, storage, and operation, giving you peace of mind whether you’re commuting, presenting, or working remotely.

Technical Details of BTI Battery

  • Battery chemistry: Lithium Ion (Li-Ion)
  • Capacity: 44 Wh
  • Compatible OEM numbers: 45N1743, 45N1742, 45N1741, 45N1740
  • Compatible models: ThinkPad T550, T550S, T560, W550, W550S
  • Form factor: Proprietary battery size

How to install BTI Battery

  • Power down your laptop completely and unplug all power sources before starting the replacement.
  • Close the lid, flip the device over, and remove the screws securing the back cover. Use proper tools and work on a clean, static-free surface.
  • Carefully lift the back cover to expose the battery bay, then disconnect the current battery connector from the motherboard and release any battery release latches.
  • Remove the old battery and align the BTI Battery with the battery bay, ensuring the connector line up with the motherboard socket. Connect the new battery’s cable firmly and place it securely into the bay.
  • Reattach the back cover and screws, then plug in the AC adapter and power on the laptop. Allow the battery to self-calibrate by charging to 100% before normal use and avoid heavy discharge cycles during the first few charging sessions.
  • If your device requires a calibration routine, follow your ThinkPad’s user manual for optimized battery reporting and longer-term accuracy of charge indication.

Frequently asked questions

  • Q: Is the BTI Battery a direct replacement for OEM parts?

    A: Yes. The BTI Battery is designed as a drop-in replacement for Lenovo OEM numbers 45N1743, 45N1742, 45N1741, and 45N1740, and it fits compatible ThinkPad models including T550, T550S, T560, W550, and W550S without circuit or connector modification.

  • Q: What runtime can I expect with the 44 Wh capacity?

    A: Runtime varies based on usage, settings, and workload. Heavier tasks like media editing or gaming will drain the battery faster, while mixed productivity tasks and light browsing will extend the period between charges. The 44 Wh rating is designed to offer a solid balance of portability and endurance for typical day-to-day work.

  • Q: Is Li-Ion the best choice for this ThinkPad battery?

    A: Lithium Ion (Li-Ion) is a common, reliable chemistry for notebook batteries, offering good energy density, lower weight, and effective cycle life when used within recommended temperature ranges. It provides stable power delivery and minimal memory effect, making it a dependable choice for ThinkPad replacements.

  • Q: How should I care for my BTI Battery after installation?

    A: For best results, avoid exposing the battery to extreme temperatures, store the device in a cool, dry place, and perform regular cycles of charging and discharging in typical usage. Keep the firmware and BIOS of your ThinkPad updated to maintain accurate battery reporting and charging behavior.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 43961779098

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Donald Rivera
Port Orchard, US
★★★★★ 5
Comfort with Style
Color: British Tan/Java, Size: 11
Very comfortable. Fits well. Very nice design.
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Reviewed in the United States on April 14, 2026
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jonathan
Draper, US
★★★★★ 4
Good, but you sacrifice a few things in favor of style
Color: Black Leather/Black, Size: 10, Color: Black Leather/Black, Size: 10
It’s much better than other shoes out there, but the design is slightly confusing. The first thing you have to know is that the shoe won’t be mind blowingly soft, but it is around as comfortable as standing on something like vans shoes. The holes on top are both a plus and a minus, when you step in a puddle, your feet get instantly soaked, but just by walking around for a bit, they dry up again. Then these holes reduce the structural integrity of the shoe, so I expect the top to be the first part of the shoe that deteriorates, when usually for all my other shoes, it’s the sole that falls off first. With the holes, you can’t shine them the traditional way, you have to be more careful as you might get goo into the inside fiber. Finally you can’t run in these, they’re larger than your foot which is quite comfortable while just standing or walking, but I’m sure they’ll tear if you don’t watch your footing. If all that is okay with you, You’ll get quite a few compliments on it as you walk around, because these are beautiful and excellent as a dress shoe/loafer hybrid
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Reviewed in the United States on September 11, 2025
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Emma
Bozeman, US
★★★★★ 5
Great gift for any guy!
Color: Black Leather/Black, Size: 12
These are one of 2 pairs of work shoes my husband will wear, the other one is the same shoe in brown. He says they’re the comfiest pair of dress shoes he’s ever had and the quality and ease of cleaning is incredible. They’ve lasted him years now so I’d say they’re well worth the money.
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Reviewed in the United States on April 7, 2026
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warren colby
Lowell, US
★★★★★ 5
Fit like a glove
Color: Black Leather/Black, Size: 12
I saw somebody wearing these a couple years ago, and I've been looking for him for a while. I really like them.They're very comfortable
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Reviewed in the United States on April 30, 2026
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Lisa D. Doubenmier
Natrona Heights, US
★★★★★ 5
Stylish and comfortable
Color: Black Leather/Black, Size: 13 Wide
Very few dress shoes fit me comfortably on the first try. I have been on my feet for 6 hours and these shoes are very comfortable and provide great support! Very happy with this pair of Cole Haan shoes!!
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Reviewed in the United States on January 8, 2026

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