# Genuine Original Laptop Battery for Lenovo ThinkPad S2 13″ Series
## Product Overview
Is your business laptop struggling to hold a charge or dying unexpected during mid-work? Bring back its long-lasting mobility with a brand new, 100% original **01AV400 battery** replacement. Engineered specifically for the premium 13.3-inch Lenovo ThinkPad 13 and ThinkPad S2 business series, this high-performance Lithium-Ion OEM battery delivers factory-standard runtime and safe day-to-day power management.
Don’t risk your laptop’s motherboard or internal circuits with uncertified third-party copycats. Opting for a genuine OEM **01AV400 battery** ensures absolute safety, stable voltage output, and maximum lifecycle durability.
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## 🔍 Technical Specifications & Cross-References
Please cross-verify your original internal battery label and part numbers before completing your order:
| Feature | Specification |
| :— | :— |
| **Battery Model ID** | **01AV400** |
| **Compatible Parts (FRU)** | **01AV401**, **01AV435**, **01AV436**, **SB10K97591** (Interchangeable) |
| **Battery Type** | Li-ion (Lithium-Ion) |
| **Voltage** | 11.25V / 11.4V |
| **Capacity** | 42Wh / 3715mAh |
| **Compatible Models** | Lenovo ThinkPad 13 (Gen 1 & Gen 2), ThinkPad S2 13″ Series |
| **Condition** | 100% Genuine OEM / Original Brand New |
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## ✨ Why Invest in a Genuine 01AV400 Battery?
### 1. Advanced OEM Safety Circuitry
Premium enterprise notebooks require precise power delivery. This genuine **01AV400 battery** features a built-in intelligent protection board (PCB) certified by global testing agencies, providing real-time defense against overcharging, high temperatures, and short-circuit faults.
### 2. Perfect Fitment & Zero Calibration Lag
Generic batteries often swell early or fit loosely inside thin-and-light laptop bases. This original part seamlessly slides into your ThinkPad’s internal frame, aligning perfectly with the mounting screw holes and matching the proprietary motherboard power pin layout without any modifications.
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## ⚠️ Vital Buying Guide & Initial Setup Advice
> **Important Reminder:** Lenovo ThinkPad has various generations of the S2 series (e.g., S2 Gen 5 / Gen 6) which use entirely different battery form factors.
1. **Double-Check Physical Code:** Please remove your laptop base cover and ensure your factory-installed battery states **01AV400**, 01AV435, or SB10K97591.
2. **First-Time Calibration:** For optimal battery health and correct Windows OS battery percentage mapping, please charge the new unit to 100%, keep it plugged for 2 more hours, and then discharge it down to 10% for the initial 2-3 cycles.
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## 📦 Shipping & Warranty Details
* **Specialist Padded Packaging:** Enclosed in anti-static shielding bags and nested in custom shock-absorbing foam inside a thick corrugated shipping box.
* **Tested Before Dispatch:** Every internal power block is strictly inspected for structural shell stability and voltage metrics before shipment.
* **Warranty Policy:** Backed by a worry-free **90-Day Replacement Warranty** against manufacturing failures (does not cover DIY user damage or torn connector ribbons).
