GetBatteryStatus.cs

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Battery_Status
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_Load(object sender, EventArgs e)
        {
           
        }

        private void timer1_Tick(object sender, EventArgs e)
        {
            PowerStatus pw = SystemInformation.PowerStatus;
            label1.Text = pw.BatteryLifePercent * 100 + "%";
        }
    }
}