Lenovo ThinkPad T490s 20NX001UUS battery
Sale price ksh 7,798
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Battery Type: Li-ion
Voltage: 11.52V
Capacity: 57WH
Color: Black
Condition: Brand New
Warranty: Full 12 Months Warranty and 30 Days Money Back
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The Lenovo ThinkPad T490s (Model 20NX001UUS) Original Battery is a high-density internal power unit specifically designed for Lenovo’s premium, ultra-slim T-series laptop. Unlike the standard T490, the "s" (slim) variant utilizes a larger capacity battery to compensate for its more compact internal design. The Lenovo ThinkPad T490s 20NX001UUS Battery Price in Kenya is KSh 7,798.
This unit provides a substantial 57Wh (approx. 4940mAh) capacity and operates at a nominal voltage of 11.52V. It serves as the direct replacement for Lenovo part numbers L18M3P73, L18L3P73, L18C3P73, and 5B10W13905. At KSh 7,798, this original-spec battery is essential for professionals who rely on the T490s for all-day mobility, supporting Rapid Charge technology to reach 80% capacity in about 60 minutes.
Who Should Buy This Battery?
This battery is a critical replacement for ThinkPad T490s (20NX) users in Kenya whose laptops are no longer holding a charge for a full workday or are showing "Service Battery" warnings. At KSh 7,798, it is the recommended investment to restore your ultrabook’s 12–20 hour runtime and protect the delicate internal components from risks associated with non-genuine alternatives.
Lenovo ThinkPad T490s 20NX001UUS Battery Price Table
| Component Name | Model Compatibility | Capacity | Price in Kenya |
| Original 3-Cell Internal | ThinkPad T490s (20NX/20NY) | 57Wh / 4940mAh | KSh 7,798 |
Lenovo ThinkPad T490s 20NX001UUS Battery Key Specifications Table
| Feature | Specification Details |
| FRU / Part Numbers | 5B10W13905, 5B10W13906, 5B10W13907 |
| Compatible Part Nos | L18M3P73, L18L3P73, L18C3P73, SB10W13905 |
| Capacity | 57Wh / 4940mAh |
| Voltage | 11.52V |
| Battery Type | Lithium-Polymer (Li-Polymer) |
| Cell Count | 3-Cell |
| Cycle Life | 300–500 Charge Cycles |
| Compatibility | ThinkPad T490s, T495s, X390, X395 |
Lenovo ThinkPad T490s 20NX001UUS Battery Performance and Safety
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High-Density Slim Design: Engineered to fit the tightly-packed internal chassis of the T490s without adding unnecessary bulk.
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Firmware Authentication: Includes an authentic Lenovo communication chip to ensure full compatibility with the BIOS and "Lenovo Vantage" software.
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Overcharge Protection: Integrated safety circuits prevent cells from overheating or overcharging during long periods of AC power use.
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Grade A Cells: High-quality lithium-polymer cells ensure a stable voltage curve, preventing sudden system shutdowns at low battery percentages.
Lenovo ThinkPad T490s 20NX001UUS Compatibility List
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T-Series: ThinkPad T490s (Types: 20NX, 20NY), ThinkPad T495s (Types: 20QJ, 20QK).
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X-Series: ThinkPad X390 (Types: 20Q0, 20Q1), ThinkPad X395 (Types: 20NL, 20NM).
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Note: This 57Wh battery is specific to the "s" series and X390/X395 models. It is not compatible with the standard ThinkPad T490, which typically uses a smaller 50Wh battery.
Lenovo ThinkPad T490s 20NX001UUS Battery Pros and Cons Table
| Pros | Cons |
| Supports 80% Rapid Charge for quick refills | Internal replacement requires tools to open the chassis |
| High 57Wh capacity for long-lasting mobility | Fragile internal cable requires careful seating |
| Guaranteed BIOS recognition and safety for KSh 7,798 | Requires disabling internal battery in BIOS before repair |
Lenovo ThinkPad T490s 20NX001UUS Battery Frequently Asked Questions (FAQs)
How long will this battery last on a full charge?
For the ThinkPad T490s, you can typically expect 10 to 15 hours of runtime for standard office work and web browsing, depending on your screen brightness and power settings.
Is it safe to replace the battery myself?
Yes, if you have a Phillips #0 screwdriver and a plastic pry tool. However, you must enter the BIOS and select "Disable Built-in Battery" under the Config/Power menu before opening the laptop to prevent short-circuits.
Why is my battery discharging even when the laptop is off?
This can be caused by "Always On USB" or "Fast Startup" settings. If the battery is old, it may also be due to natural cell degradation. Replacing it with this KSh 7,798 unit will restore standard standby performance.
Lenovo ThinkPad T490s 20NX001UUS Battery Conclusion
The Lenovo ThinkPad T490s (20NX001UUS) 57Wh Battery at KSh 7,798 is a reliable and safe solution for restoring your premium ultrabook's productivity. It provides the exact technical specifications and safety features required to keep your business-class device running efficiently.
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Delivery estimates take into consideration both the delivery address and the types of products being ordered.
The remainder of this article discusses delivery times in more general terms.
Same Day Delivery / For Customers in Nairobi Metropolitan Area
We use Courier for these orders, which allows fast and reliable delivery to destinations across their comprehensive domestic network. Orders placed between 7 Am and 5 Pm will be delivered the same day otherwise they will be delivered the following day. Delivery times vary depending on a product's stock status and the intended delivery address. For very large orders, we may be forced to use Mainfreight as these orders lie outside of what Courier Rider services can handle. If your order is being shipped with Mainfreight, this will be indicated in your fulfilment email along with a tracking number.
Overnight Delivery
Most In stock products are delivered overnight anywhere in Kenya – provided the order is placed before the advertised cut-off time. Our Overnight Delivery cut-off is usually 4:30pm Monday to Friday, however, this is updated daily and the expected shipping date will be shown for you on the product page. Larger products take an additional 1–2 days to be delivered.
Evening Express Delivery
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The warranty tendered hereunder, on the electronic product(s) sold under this invoice will be provided exclusively by their respective Authorized Agents/Distributors and are limited to one year from the date of this invoice, except otherwise mentioned as per the warranty conditions as carried along with the products(s) or mentioned on Rondamo Technologies Invoice
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