Description
Product Overview
Genuine Lenovo L21M3PG1 42Wh replacement battery designed specifically for your ThinkPad laptop. This high-quality battery ensures reliable performance and extended usage time.
Specifications
- Battery Capacity: 42Wh
- Voltage: Compatible with original specifications
- Chemistry: Lithium-ion
- Condition: Brand new, factory fresh
- Part Number: L21M3PG1
Compatibility Information
Part Numbers (P/N)
- 5B11F21940
- 5B11F21942
- 5B11F21943
- 5B11F21948
- L21L3PG1
- SB11F21949
Models
- ThinkPad L14 Gen 3 (21C1/21C2)
- ThinkPad L14 Gen 3 (21C5/21C6)
- ThinkPad L15 Gen 3 (21C3/21C4)
- ThinkPad L15 Gen 3 (21C7/21C8)
Note: This battery is compatible with additional part numbers and models beyond those listed. If you’re unsure about compatibility, please leave your specific laptop model or current battery part number in the order notes during checkout, and we’ll verify compatibility for you.
When to Replace Your Battery
| Situation | Description |
|---|---|
| Short Battery Life | Battery drains significantly faster than when new, lasting less than 2 hours with normal use |
| Swelling/Bulging | Battery case appears swollen or distorted, creating gap between battery and laptop |
| Charging Issues | Battery won’t hold charge, charges intermittently, or system shows “plugged in, not charging” |
| System Warnings | Laptop displays “replace battery” or “battery not detected” messages |
| Age | Battery is over 2-3 years old with noticeable performance degradation |
| Sudden Shutdowns | Laptop turns off unexpectedly even when battery indicator shows remaining charge |
Estimated Battery Life
| Usage Scenario | Estimated Duration |
|---|---|
| Web Browsing & Email | 3-4 hours |
| Document Editing | 4-5 hours |
| Video Streaming | 2.5-3.5 hours |
| Gaming | 1-2 hours |
| Mixed Use | 3-4 hours |
| Standby/Sleep | Up to 48 hours |
Note: These are conservative estimates for a new battery used with older hardware. Actual battery life may be shorter than when your laptop was new due to increased power demands from software updates and natural hardware aging.
Purchase Benefits
- Same day shipping on orders placed before 3PM
- 30-day money-back guarantee
- 1-year manufacturer warranty
- In stock, ready to ship
- Brand new, never used
- Free shipping on all orders
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