Description
Product Overview
This genuine Lenovo L21M3PG1 42Wh battery provides reliable power for your compatible Lenovo devices. Manufactured to meet original specifications for optimal performance and safety.
Specifications
- Battery Part Number: L21M3PG1
- Capacity: 42Wh
- Chemistry: Lithium-ion
- Condition: Brand new, factory fresh
Compatible Part Numbers (P/N)
- 5B11F21940
- 5B11F21942
- 5B11F21943
- 5B11F21948
- L21L3PG1
- SB11F21949
Compatible 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)
When to Consider Battery Replacement
| Symptom | Description |
|---|---|
| Short Battery Life | Device powers off quickly when unplugged, lasting significantly less than original runtime |
| Swelling/Bulging | Battery appears physically swollen, causing case separation or trackpad/touchpad issues |
| Charging Problems | Battery won’t charge fully, charges intermittently, or requires specific positioning |
| System Warnings | OS displays “Service Battery” or “Replace Soon” alerts, or battery icon shows X mark |
| Unexpected Shutdowns | Computer turns off suddenly at 20-30% charge or reports inaccurate charge levels |
| Overheating | Battery becomes unusually hot during charging or normal use |
| Age Factor | Battery is 2-3+ years old with noticeable performance degradation |
Compatibility Note
The compatibility list shown represents common models and part numbers. Many additional compatible devices exist. If your specific model or battery part number isn’t listed, please leave it in the order notes during checkout. We will verify compatibility before shipping.
Shipping & Warranty
- Ships within 1 business day
- 30-day money back guarantee
- 1-year manufacturer warranty
- In stock, ready to ship
- Free shipping included
- 100% brand new product
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