Laptop Battery for Lenovo G40 G50-30 G50-45 G50-70 G50-75M G50-80 Z40-70 G400S 11.4V 4400mAh (48Wh) Replacement for L13S4E01 L13M4E01 24-Month Warranty

**Important
Voltage Warning: **
Please verify your original battery voltage before purchasing. This battery is designed for 11.4V systems. Using a battery with incorrect voltage may cause charging failure or damage to your laptop. If your original battery is 11.1V or 14.8V, this product will NOT work.

**Compatible Laptop Models (Full List): **
Lenovo G40 Series: G40-30, G40-45, G40-70, G40-80
Lenovo G50 Series: G50-30, G50-45, G50-70, G50-75M, G50-80
Lenovo G400S Series: G400S, G400S Touch
Lenovo Z40 Series: Z40-70, Z40-75
Also fits: G50-30, G50-45, G50-70, G50-75M, G50-80, G400S, G400S Touch, Z40-70, Z40-75, and similar models with the same battery compartment.

**Replacement Part Numbers: **
L13S4E01, L13M4E01, L13L4E01, L13L4E02, L13L4E03, L13M4E02, 5B10G92331, 5B10G92332, 5B10G92333, 5B10G92334, 5B10G92335, 5B10G92336, 5B10H92337, 5B10H92338

**Specifications Table: **

| Parameter | Value |
|-----------|-------|
| Voltage | 11.4V |
| Capacity | 4400mAh / 48Wh |
| Cell Type | Li-ion |
| Color | Black |
| Weight | Approx. 280g |
| Warranty | 24 Months |

**Comparison Table (vs. Standard 2600mAh
Battery): **

| Feature | This Battery (4400mAh) | Standard Battery (2600mAh) |
|---------|------------------------|----------------------------|
| Runtime (Typical Use) | 46 hours | 23 hours |
| Charge Cycles | 500+ | 300400 |
| Weight | 280g | 260g |
| Price per Hour | Lower | Higher |

**Installation Tips: **

1. Power off your laptop and unplug the AC adapter.

2. Remove the bottom panel (some models may require removing the entire back cover).

3. Disconnect the old battery cable and remove the screws holding the battery.

4. Insert the new battery, tighten screws, and reconnect the cable.

5. Close the panel, plug in the charger, and let the battery charge to 100% before first use.

6. For best performance, calibrate the battery once a month: fully charge, then fully discharge to 5%, then recharge to 100%.

**Whats in the Box: **
- 1x Laptop Battery ( 11.4V 4400mAh)
-
(English)

**Note: ** This is a third-party replacement battery, not an OEM Lenovo product. It is fully tested and certified to meet or exceed original specifications. If you experience any issues, please contact us immediately for a replacement or refund.