Description
Product Overview
This genuine Lenovo 42T4523 replacement battery delivers reliable power for your ThinkPad laptop. With 44Wh capacity and lithium-ion technology, it provides stable performance and extended runtime.
Specifications
- Part Number: 42T4523
- Capacity: 44Wh
- Chemistry: Lithium-ion
- Condition: Brand new
- Compatibility: See detailed lists below
Compatible Part Numbers (P/N)
- 42T4521, 42T4522, 42T4642, 42T4643
- 43R1965, 43R1967
- ASM 42T4519, ASM 42T4523
- FRU 42T4518, FRU 42T4522
- Lenovo-42T4523-44Wh
Compatible Models
- ThinkPad Reserve Edition 8748
- ThinkPad X300 (2748, 2749, 6476, 6477, 6478)
- ThinkPad X301 (2774, 2776, 2777, 2778, 2779, 4057)
Need Help Finding Your Model?
We’ve listed the most common compatible part numbers and models above, but there are additional compatible devices. If you don’t see your specific model or part number listed, please leave it in the order notes during checkout. We’ll verify compatibility before shipping.
When Should You Replace Your Battery?
| Situation | Description |
|---|---|
| Short Runtime | Battery drains significantly faster than original capacity, lasting less than 1 hour |
| Swelling/Bulging | Battery case appears swollen or deformed, indicating potential safety hazard |
| No Charge | Battery won’t charge despite using correct charger and power source |
| System Warnings | Laptop displays “Replace Battery” or similar warning messages |
| Age | Battery is over 2-3 years old with noticeable performance degradation |
| Random Shutdowns | Laptop shuts down unexpectedly even with reported charge remaining |
Estimated Battery Life
| Usage Scenario | Estimated Runtime |
|---|---|
| Web Browsing & Email | 2-3 hours |
| Word Processing | 2.5-3.5 hours |
| Video Playback | 1.5-2.5 hours |
| Gaming | 1-1.5 hours |
| Standby/Sleep | Up to 48 hours |
Note: These are conservative estimates for a new battery in older hardware. Actual runtime may be shorter than when your device was new due to increased software demands and general system power consumption over time.
Shipping & Warranty
- Ships within 1 business day
- 30-day money back guarantee
- 1-year manufacturer warranty
- Free shipping
- In stock, brand new product
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