Description
Product Overview
This genuine Lenovo 00NY639 44Wh battery is designed specifically for compatible ThinkPad models. It delivers reliable power and performance for your mobile computing needs.
Specifications
- Battery Type: Lithium Ion
- Capacity: 44Wh
- Voltage: 10.8V
- Condition: Brand New
- Part Number: 00NY639
Compatible Part Numbers (P/N)
- 45N1740
- 45N1741
- 45N1742
- 45N1743
- SB10K12721
- 00NY639
Compatible Models
- ThinkPad P50s (20FL, 20FK)
- ThinkPad T550 (20CK, 20CJ)
- ThinkPad T560 (20FH, 20FJ)
- ThinkPad W550s (20E2, 20E1)
Need Help Finding the Right Battery?
We’ve listed the most common compatible part numbers and models above, but there are additional compatible devices. If you’re unsure about compatibility, please leave your specific laptop model or current battery part number in the order notes during checkout. We’ll verify compatibility before shipping.
When Should You Replace Your Laptop Battery?
| Situation | Description |
|---|---|
| Short Battery Life | Battery drains significantly faster than when new, lasting less than 1-2 hours |
| Swelling/Bulging | Battery case appears swollen or distorted – replace immediately for safety |
| Not Holding Charge | Battery doesn’t charge fully or discharges rapidly even when showing full charge |
| System Warnings | Laptop displays “Replace Battery” or similar power-related warnings |
| Age Factor | Battery is 2-3 years old with noticeable performance degradation |
| Random Shutdowns | Laptop shuts down unexpectedly even with remaining charge indicated |
Estimated Battery Life by Usage
| Usage Scenario | Estimated Runtime |
|---|---|
| Web Browsing & Email | 3-4 hours |
| Word Processing | 4-5 hours |
| Video Streaming | 2-3 hours |
| Gaming | 1-2 hours |
| Mixed Use | 3-4 hours |
Note: These are conservative estimates for a new battery used with older hardware. Actual runtime may be shorter than when your laptop was new due to increased power demands from software updates and natural hardware aging.
Shipping & Warranty
- Ships in 1 business day
- 30-day money back guarantee
- 1-year warranty
- In stock, ready to ship
- Free shipping
- 100% brand new product
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