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Description
Replacement bti battery for toshiba e45t series e45t-a4100 e45t-a4200 e45t-a4300e45t-ast2n01 e45t-ast2n02 e55 series e55-a5114 e55t series e55t-a5320 e55t-ast2n01 u940 11.4v 4160mah li-ion 50 whr 3 cellMeet the BTI Battery, a premium replacement designed to power a wide range of laptops in the E45T and E55T families, plus U940. Engineered to align with OEM specifications PA5157U 1BRS and P000577250, this battery ensures a seamless install and dependable performance. The BTI Battery features a proprietary size that provides a precise fit in the battery bay, reducing the risk of loose connections and ensuring reliable contact with the devices power
Meet the BTI Battery, a premium replacement designed to power a wide range of laptops in the E45T and E55T families, plus U940. Engineered to align with OEM specifications PA5157U-1BRS and P000577250, this battery ensures a seamless install and dependable performance. The BTI Battery features a proprietary size that provides a precise fit in the battery bay, reducing the risk of loose connections and ensuring reliable contact with the device’s power system. If you own an E45T-A4100, E45T-A4200, E45T-A4300, E45T-AST2N01, E45T-AST2N02, E55T-A5114, E55T-A5320, E55T-AST2N01, or U940, you’ll appreciate the balance of compatibility, safety, and efficient charging this battery delivers. In addition, the BTI Battery is noted for faster charging times, helping you cut downtime and stay productive when you need power most.
- Broad compatibility with OEM references: Specifically designed to work with PA5157U-1BRS and P000577250, covering a spectrum of models in the E45T and E55T series as well as U940. This ensures a reliable replacement option that mirrors the performance of your original battery.
- Faster charging performance: The BTI Battery is engineered to take lesser time to charge compared with standard batteries, helping you reduce downtime and get back to work or play quicker after every recharge.
- Proprietary battery size for reliable fit: The battery uses a proprietary footprint intended to provide a snug, secure fit in compatible devices, improving contact stability and reducing the chance of movement or misalignment during use.
- Consistent power delivery and longer life: Built to deliver steady voltage and dependable capacity across cycles, the BTI Battery supports extended runtimes and dependable performance for everyday computing tasks and multimedia use.
- Durable construction with safety-conscious design: Crafted to withstand daily wear and tear, with attention to safety and quality standards to minimize risks during charging and operation, so you can rely on power when you need it most.
Technical Details of BTI Battery
- OEM compatibility: PA5157U-1BRS, P000577250
- Compatible models and series: E45T-A4100, E45T-A4200, E45T-A4300, E45T-AST2N01, E45T-AST2N02, E55-A5114, E55T-A5320, E55T-AST2N01, U940
- Proprietary battery size: Proprietary design with a precise fit for supported models
- Charging performance: Designed to deliver faster charging times relative to standard batteries
- Core design and reliability: Built to maintain stable power delivery through repeated charge-discharge cycles
How to Install BTI Battery
- Prepare and power down: Turn off your device, unplug from any power source, and remove any peripherals. This reduces the risk of electrical shock and protects internal components during replacement.
- Access the battery: In most models, remove the back cover or access panel to locate the existing battery. Use the appropriate screwdriver to open the panel carefully.
- Disconnect the old battery: Gently disconnect the battery connector from the motherboard or power hub. If clips or screws secure the battery, remove them and set the old battery aside.
- Install the BTI Battery: Align the BTI Battery with the battery bay, connect the connector securely, and ensure the battery sits flush with the chassis. Reinstall any screws or retention clips that held the old battery in place.
- Reassemble and test: Reattach the back cover, reconnect power, and power on the device. Allow the battery to reach a full charge before first use to calibrate the system’s battery gauge.
Frequently Asked Questions
- Q: Is this BTI Battery compatible with my device? A: The BTI Battery is designed to be compatible with OEM PA5157U-1BRS and P000577250, covering E45T-A4100, E45T-A4200, E45T-A4300, E45T-AST2N01, E45T-AST2N02, E55-A5114, E55T-A5320, E55T-AST2N01, and U940 models. If your device matches these series or models, this battery should fit as a replacement.
- Q: How long does charging take with this battery? A: The BTI Battery is noted to take lesser time to charge compared with many other batteries, helping you reduce downtime and stay productive.
- Q: How should I care for this battery to maximize life? A: For optimal longevity, avoid extreme temperatures, aim to keep the battery between 20% and 80% where practical, and perform a full calibration after extended storage or first use after installation. Regularly update device firmware to ensure accurate battery reporting.
- Q: Is this an official OEM replacement? A: This battery is a compatible OEM replacement designed to match the referenced OEM specifications (PA5157U-1BRS, P000577250). It provides OEM-style performance and reliability while offering a cost-effective alternative to original equipment manufacturer batteries.
- Q: What models does the proprietary size fit? A: The proprietary size is tailored for a specific subset of E45T and E55T series devices and U940. Confirm your model matches the listed compatibility before purchasing to ensure proper fit and performance.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.5 ★★★★★
Based on 22 reviews
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Product Reviews
★★★★★ 5
super smooth, silky, stays comfortable feeling. DO NOT DRY or wash with heat
Color: Blue, Size: Queen (U.S. Standard), Set name: Stretchy and Soft, Color: Blue, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
I'm impressed. I have used cooling pillow cases before, and found them effective, but the cooling material have always been on just one side. These are 100% cooling material. The material is super smooth and silky feeling. It is great feeling against hair and skin (even better than my old polyester satin I was using before cooling pillowcases). The material is cool, and does not seem to get hot hot. The pillow cases are super stretchy with a small hidden zipper. They grab onto the pillow and dont loosen up. Makes my pillow look neat and clean, not sloppy from loose material. I can even have two pillows stacked and somehow despite being a smooth material, the pillows dont just slide off each other.
The cooling aspect works by not trapping heat, not allowing heat to get to the pillow and hold it there. So yeh, the pillow case will feel warm eventually but if you have a fan, or AC, or flip the pillow, then it is is truly cool. Otherwise in my experience when I use a pillow without this, the pillow just gets hot, stays hot, and even with flipping it feels hot.. because the pillow itself has trapped the heat for remainder of night. Yuck.
One thing to know and this is very important-- as I learned the hard way-- DO NOT DRY IN DRYER. DO NOT WASH IN HOT WATER. Heat will destroy the material ability to feel and stay cool. Do you want a regular heat trapping pillow case? Then go ahead and dry these in the dryer a few times and you will have a regular pillow case. HOw do I know? I bought these to replace another set (different brand, same idea, same instructions that I failed to remember). I always dried them in the dryer, and one night after having gloriously cool pillows, I noticed that my pillow was HOT night after night. It was then when looking for another set of pillow cases that I learned that they cant be exposed to heat like that. SO PLEASE, just AIR DRY.
And so, after I got these and put them on my pillows, I had a much better nights rest. I remember thinking that I wasnt waking to rearrange my pillows. They were just comfortable all night long. Sure, I'd love an even colder pillow, but our room is on the warm side. But at least I wasnt noting the hot hot pillows anymore.
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Reviewed in the United States on June 6, 2021
★★★★★ 5
A must try for hot sleepers!
Color: Blue, Size: Queen (U.S. Standard), Set name: Silky, Color: Blue, Size: Queen (U.S. Standard), Set name: Silky
If you are a hot sleeper these pillowcases are for you! Not only are they silky and beautiful, but they are cool to the touch!The Arc-Chill fabric absorbs heat and instantly cools your skin! If you are prone to insomnia, night sweats, give these a try! They come in a 2 pack and have a few different colors to try out. Highly recommend.
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Reviewed in the United States on May 27, 2026
★★★★★ 5
Freezing !
Color: Gray, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
### Product Review: Avolare 2 Pack Cooling Pillow Cases
#### Overview
The Avolare 2 Pack Cooling Pillow Cases are designed to provide a cooler and more comfortable sleeping experience, especially for hot sleepers. Made with Arc-Chill fabric, these pillowcases promise to offer a cooling effect, protect hair and skin, and add a touch of luxury with their soft and silky texture. The pillowcases come in a standard gray color, suitable for standard and queen-size pillows.
#### Material and Design
**Rating: ★★★★★**
The Avolare Cooling Pillow Cases are crafted from Arc-Chill fabric, known for its high Q-max value (>0.5), indicating excellent cooling properties. The material feels incredibly soft and silky to the touch, providing a luxurious feel that enhances sleep quality. The gray color is neutral and versatile, fitting seamlessly with various bedding styles.
The design includes a hidden zipper, ensuring that the pillowcase stays securely on the pillow while maintaining a smooth and sleek appearance. The zipper is discreet and doesn’t interfere with comfort, which is a thoughtful addition to the overall design.
#### Cooling Effect
**Rating: ★★★★★**
One of the standout features of these pillowcases is their cooling effect. The Arc-Chill fabric effectively wicks away heat and moisture, making them ideal for hot sleepers or those living in warmer climates. Users have reported a noticeable difference in temperature, which contributes to a more restful and comfortable night’s sleep. This cooling property is particularly beneficial during the summer months or for individuals who tend to overheat while sleeping.
#### Hair and Skin Benefits
**Rating: ★★★★☆**
In addition to their cooling properties, the Avolare pillowcases are also beneficial for hair and skin. The smooth and silky texture reduces friction, helping to prevent hair breakage and skin irritation. This can be particularly advantageous for individuals with sensitive skin or those prone to hair damage. While the pillowcases are not a cure-all for skin and hair issues, they do contribute positively by creating a gentler surface.
#### Durability and Care
**Rating: ★★★★☆**
The Avolare Cooling Pillow Cases are easy to care for, maintaining their cooling properties and softness even after multiple washes. They are machine washable, which adds to their convenience. However, it is recommended to follow the care instructions carefully to ensure the longevity of the cooling effect and fabric quality.
#### Versatility
**Rating: ★★★★☆**
These pillowcases are designed to fit both standard and queen-size pillows, adding to their versatility. They are perfect for use in any bedroom setting, from master bedrooms to guest rooms, and can be paired with various pillow types and fillings.
#### Pros and Cons
**Pros:**
- Excellent cooling properties ideal for hot sleepers.
- Soft and silky texture is gentle on hair and skin.
- Hidden zipper design for a secure fit.
- Machine washable and easy to care for.
- Versatile fit for standard and queen-size pillows.
**Cons:**
- Cooling effect may diminish slightly with frequent washing.
- Limited color options (only available in gray).
#### Final Verdict
**Overall Rating: ★★★★☆**
The Avolare 2 Pack Cooling Pillow Cases are an excellent choice for anyone looking to enhance their sleeping experience, particularly hot sleepers. The cooling properties of the Arc-Chill fabric, combined with the soft and silky texture, provide a comfortable and luxurious feel. The hidden zipper design adds practicality without sacrificing aesthetics.
While there are minor drawbacks, such as potential diminishing of the cooling effect with frequent washing and limited color options, the overall benefits make these pillowcases a worthwhile investment. If you’re seeking to improve your sleep quality and enjoy a cooler, more comfortable night’s rest, the Avolare Cooling Pillow Cases are definitely worth considering.
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Reviewed in the United States on June 1, 2024
★★★★★ 4
Cool as the other side of the pillow
Color: Gray, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
Good quality and keeps cool on side of pillow. Have to flip pillow for constant cooling is the ok only down side. Love the material as it is very soft and silky feel to it. Doesn't wrinkle over pillow and had some good color options. Easy to clean. Fair price for a good product
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Reviewed in the United States on January 11, 2026
★★★★★ 5
Love!
Color: Blue, Size: Queen (U.S. Standard), Set name: Stretchy and Soft
Awesome cases! They really are cool to the touch. I didn’t sleep hot at all. I have a “cut-out” memory foam pillow, and this stretched around it perfectly. It is flexible enough that it doesn’t impede with the cut out. And while the material is “silky,” it doesn’t slide around the pillow while sleeping on it. The zipper feature is perfect. I washed and dried per the tag instructions and they washed very well. Super happy.
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Reviewed in the United States on April 8, 2026