diff --git a/Aerial/Source/Models/Time/TimeManagement.swift b/Aerial/Source/Models/Time/TimeManagement.swift
index c09a0e70..21bb31d8 100644
--- a/Aerial/Source/Models/Time/TimeManagement.swift
+++ b/Aerial/Source/Models/Time/TimeManagement.swift
@@ -393,7 +393,7 @@ final class TimeManagement: NSObject {
 
     // MARK: - Battery detection
     func isOnBattery() -> Bool {
-        return IOPSGetTimeRemainingEstimate() != -2.0
+        return IOPSGetTimeRemainingEstimate() != kIOPSTimeRemainingUnlimited
     }
 
     func isBatteryLow() -> Bool {