diff --git a/crates/tinymist-std/src/battery.rs b/crates/tinymist-std/src/battery.rs
index 31046f0..ed81631 100644
--- a/crates/tinymist-std/src/battery.rs
+++ b/crates/tinymist-std/src/battery.rs
@@ -1,34 +1,9 @@
 //! Battery-related utilities.
 
-#[cfg(feature = "system")]
-mod system {
-    /// Detects if the system is currently in power saving mode.
-    pub fn is_power_saving() -> bool {
-        ::battery::Manager::new()
-            .ok()
-            .and_then(|manager| manager.batteries().ok())
-            .map(|batteries| {
-                let mut batteries = batteries.peekable();
-                if batteries.peek().is_none() {
-                    return false;
-                }
-                batteries.all(|battery| match battery {
-                    Ok(bat) => matches!(bat.state(), ::battery::State::Discharging),
-                    Err(_) => false,
-                })
-            })
-            .unwrap_or(false)
-    }
-}
-#[cfg(feature = "system")]
-pub use system::*;
-
-#[cfg(not(feature = "system"))]
 mod other {
     /// Detects if the system is currently in power saving mode.
     pub fn is_power_saving() -> bool {
         false
     }
 }
-#[cfg(not(feature = "system"))]
 pub use other::*;