Description

L21D4PG1 L21L4PG1 L21C4PG1 L21M4PG1 Battery for Lenovo ThinkPad L13 Yoga Gen 3 (15.2V 44Wh 4-Cell Li-Poly)

Voltage 15.2V,
Capacity 2900mAh/44Wh,
Number of Cells/type 4 (Li-Poly),
Colour Black,

Compatible part number/s

Lenovo
L21D4PG1, L21L4PG1, L21C4PG1, L21M4PG1

Can be used with the following device

Lenovo
ThinkPad L13 Yoga Gen 3

How to Check Your Laptop Battery Health

Method 1: Use Windows Battery Report

This is one of the best ways to see the actual condition of your battery.

Step 1 — Open Command Prompt

1. Press Windows + R.
2. Type cmd.
3. Press Enter.

Step 2 — Generate a battery report

Type:

powercfg /batteryreport

Then press Enter.

Windows will create a battery health report, usually saved as:

C:UsersYourNamebattery-report.html

Step 3 — Open the report

Copy the location shown in Command Prompt and paste it into your web browser.

Look for these two figures:

• Design Capacity — the battery’s original capacity when new.
• Full Charge Capacity — how much capacity the battery can currently hold.

Step 4 — Calculate battery health

Use:

Battery Health % = Full Charge Capacity ÷ Design Capacity × 100

For example:

• Design Capacity: 50,000 mWh
• Full Charge Capacity: 40,000 mWh

Battery health:

40,000 ÷ 50,000 × 100 = 80%

So the battery has approximately 80% of its original capacity remaining.

What do the results mean?