update HasReadableBattery to check all batteries

agent/battery/battery.go

@@ -5,8 +5,6 @@ package battery
 
 import (
 	"errors"
-	"fmt"
-	"os"
 	"log/slog"
 
 	"github.com/distatus/battery"
@@ -22,14 +20,12 @@ func HasReadableBattery() bool {
 	}
 	haveCheckedBattery = true
 	batteries, err := battery.GetAll()
-	if err != nil {
-		// even if there's errors getting some batteries, the system
-		// definitely has a battery if the list is not empty.
-		// This list will include everything `battery` can find,
-		// including things like bluetooth devices.
-		fmt.Fprintln(os.Stderr, err)
+	for _, bat := range batteries {
+		if bat.Full > 0 {
+			systemHasBattery = true
+			break
+		}
 	}
-	systemHasBattery = len(batteries) > 0
 	if !systemHasBattery {
 		slog.Debug("No battery found", "err", err)
 	}