High Quality 14.8V 3100mAh/46Wh LENOVO 45N1139 Battery For Lenovo ThinkPad S440 S431
Do you want to buy a cheap LENOVO 45N1139 Compatible battery? We offer you a cheap LENOVO 45N1139 Compatible battery - an incredibly high quality Compatible battery! All LENOVO 45N1139 are brand new,1 year Warranty, 100% Guarantee Quality and Fully Test!
LENOVO 45N1139 Battery applicable to more models :
✔ Battery for 45N1139 Ships to Singapore
Product Overview
This battery is suitable as a replacement battery for Lenovo ThinkPad S440 S431 battery and LENOVO 45N1139 model.
High capacity LENOVO 45N1139 battery for longer standby time.
The battery is professionally tested to ensure the best lifespan.
1 year warranty, 30 days money back, 100% brand new!
Battery capacity (mAh/A/W) may be different; the more mAh/A/W it displays, the higher its autonomy.
Safety certified CE / FCC / RoHS.
Key Features
- High‑capacity design with 3100mAh/46Wh for extended device runtime.
- Stable 14.8V output ensures consistent performance during daily use.
- Built with high‑quality lithium‑ion cells for improved durability and long cycle life.
- Advanced protection system including overcharge, over‑discharge, overheat, and short‑circuit safeguards.
- Optimized for reliable performance in warm and humid environments.
- Lightweight and compact design for easy installation and device compatibility.
Technical Specifications
| Model | 45N1139 |
| Battery Condition | Brand New Replacement Battery |
| Item Code | LEN10X90_1 |
| Category | Laptop Batteries |
| Brand | LENOVO |
| Capacity | 3100mAh/46Wh |
| Voltage | 14.8V |
| Type | Li-ion |
| Color | Black |
| Applies to | Lenovo ThinkPad S440 S431 |
| Certification | Passed CE, UL, ROHS, ISO 9001/9002 and GS certification |
| Service | Buy now, we promise a one-year warranty and 30-day returns |
Compatible Models
Replacement Part Numbers:
Compatible Models：
Lenovo ThinkPad S440
Lenovo ThinkPad S431
Note: this battery model are two interface ref to the picture. If your want another battery, just search the item "LEN10X90_2".
* Please make sure that the replacement battery you are buying is suitable for your device brand and model.
Battery Care & Maintenance
- Store the battery in a cool, dry environment to maintain long‑term performance.
- Avoid exposing the battery to excessive heat or direct sunlight, especially in warm and humid climates.
- Use compatible LENOVO chargers or certified charging accessories to ensure safe and efficient charging.
- Avoid frequent full discharges; partial charge cycles help extend overall battery lifespan.
- If the battery will not be used for an extended period, keep it at around 40–60% charge before storage.
- Clean the battery contacts periodically with a dry cloth to maintain stable power delivery.
- Do not puncture, crush, or expose the battery to water or high humidity.
Frequently Asked Questions
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