diff --git a/src/args.rs b/src/args.rs
index bc60216..e99c145 100644
--- a/src/args.rs
+++ b/src/args.rs
@@ -22,6 +22,8 @@ pub fn get_args() -> ArgsResult {
         } else if arg.starts_with("--interval-sec=") {
             let (_, back) = arg.split_at(15);
             map.insert("interval-sec".into(), back.into());
+        } else if arg == "--acpi-builtin" {
+            map.insert("acpi-builtin".into(), String::new());
         } else if arg.starts_with("--regex-cmd=") {
             let (_, back) = arg.split_at(12);
             regex_cmds.push(back.to_owned());
@@ -52,6 +54,11 @@ pub fn print_usage() {
             b"  --interval-sec=<seconds>\t\t\t\tOutput at intervals of <seconds> (default 5)\n",
         )
         .ok();
+    stderr_handle
+        .write_all(
+            b"  --acpi-builtin\t\t\t\tUse \"acpi -b\" built-in fetching (battery info, with color)\n",
+        )
+        .ok();
     stderr_handle
         .write_all(
             b"  --regex-cmd=<cmd>[SPLIT]<args...>[SPLIT]<regex>\tUse an output of a command as a metric\n",
diff --git a/src/builtin.rs b/src/builtin.rs
new file mode 100644
index 0000000..8175425
--- /dev/null
+++ b/src/builtin.rs
@@ -0,0 +1,101 @@
+use std::process::Command;
+
+use crate::swaybar_object::SwaybarObject;
+use regex::Regex;
+
+#[derive(Debug)]
+pub struct BattInfo {
+    regex: Regex,
+    acpi_error: bool,
+}
+
+impl Default for BattInfo {
+    fn default() -> Self {
+        Self {
+            regex: Regex::new("([0-9]+)%.*").expect("Should be able to compile regex"),
+            acpi_error: false,
+        }
+    }
+}
+
+impl BattInfo {
+    pub fn is_error_state(&self) -> bool {
+        self.acpi_error
+    }
+
+    pub fn update(&mut self, object: &mut SwaybarObject) -> Result<(), ()> {
+        if self.acpi_error {
+            return Err(());
+        }
+        let output_string: String;
+        let output_percentage: u8;
+        if let Ok(string) = self.get_acpi_string() {
+            (output_string, output_percentage) = string;
+
+            let percentage: f32 = output_percentage as f32 / 100.0f32;
+            let red: u8 = if percentage > 0.5f32 {
+                (255.0f32 * (1.0f32 - (percentage - 0.5f32) * 2.0f32)) as u8
+            } else {
+                255u8
+            };
+            let green: u8 = if percentage > 0.5f32 {
+                255u8
+            } else {
+                (255.0f32 * percentage * 2.0f32) as u8
+            };
+            let color: String = format!("#{:x}{:x}00ff", red, green);
+
+            object.update_as_generic(output_string, Some(color));
+
+            Ok(())
+        } else {
+            self.acpi_error = true;
+            Err(())
+        }
+    }
+
+    fn get_acpi_string(&mut self) -> Result<(String, u8), ()> {
+        if self.acpi_error {
+            return Err(());
+        }
+        let mut cmd_builder = Command::new("acpi");
+        cmd_builder.arg("-b");
+        let output_result = cmd_builder.output();
+        if let Ok(output_unwrapped) = output_result {
+            let string_result = String::from_utf8(output_unwrapped.stdout);
+            if let Ok(string) = string_result {
+                let regex_captures_result = self.regex.captures(&string);
+                if regex_captures_result.is_none() {
+                    self.acpi_error = true;
+                    return Err(());
+                }
+                let regex_captures = regex_captures_result.unwrap();
+                let full_result = regex_captures.get(0);
+                if full_result.is_none() {
+                    self.acpi_error = true;
+                    return Err(());
+                }
+                let full_string = full_result.unwrap().as_str().to_owned();
+                let percentage_result = regex_captures.get(1);
+                if percentage_result.is_none() {
+                    self.acpi_error = true;
+                    return Err(());
+                }
+                let percentage_result = percentage_result.unwrap().as_str().parse::<u8>();
+                if percentage_result.is_err() {
+                    self.acpi_error = true;
+                    return Err(());
+                }
+                let percentage: u8 = percentage_result.unwrap();
+
+                Ok((full_string, percentage))
+            } else {
+                self.acpi_error = true;
+                Err(())
+            }
+        } else {
+            self.acpi_error = true;
+            Err(())
+        }
+    }
+}
diff --git a/src/main.rs b/src/main.rs
index ab008f6..25204b8 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,4 +1,5 @@
 mod args;
+mod builtin;
 mod external;
 mod proc;
 mod swaybar_object;
@@ -72,6 +73,12 @@ fn main() {
         }
     }
 
+    let mut batt_info: builtin::BattInfo = Default::default();
+    {
+        let mut temp_object = SwaybarObject::new("battinfo".to_owned());
+        batt_info.update(&mut temp_object).ok();
+    }
+
     println!(
         "{}",
         serde_json::to_string(&swaybar_object::SwaybarHeader::new())
@@ -204,6 +211,20 @@ fn main() {
             }
         }
 
+        // batt_info
+        if !batt_info.is_error_state() {
+            if is_empty {
+                let mut new_object = SwaybarObject::new("battinfo".to_owned());
+                if batt_info.update(&mut new_object).is_ok() {
+                    array.push_object(new_object);
+                }
+            } else if let Some(obj) = array.get_by_name_mut("battinfo") {
+                if batt_info.update(obj).is_err() {
+                    obj.update_as_error("BATTINFO ERROR".to_owned());
+                }
+            }
+        }
+
         // loadavg
         {
             let loadavg_result = proc::get_loadavg();