diff --git a/asus/battery.nix b/asus/battery.nix
index c9a45b1..d61e350 100644
--- a/asus/battery.nix
+++ b/asus/battery.nix
@@ -1,7 +1,7 @@
 { config, pkgs, lib, ... }:
 let
   p = pkgs.writeScriptBin "charge-upto" ''
-    echo ''${0:-100} > /sys/class/power_supply/BAT0/charge_control_end_threshold
+    echo ''${0:-100} > /sys/class/power_supply/BAT?/charge_control_end_threshold
   '';
   cfg = config.hardware.asus.battery;
 in
@@ -30,7 +30,7 @@ in
       serviceConfig = {
         Type = "oneshot";
         Restart = "on-failure";
-        ExecStart = "${pkgs.runtimeShell} -c 'echo ${toString cfg.chargeUpto} > /sys/class/power_supply/BAT0/charge_control_end_threshold'";
+        ExecStart = "${pkgs.runtimeShell} -c 'echo ${toString cfg.chargeUpto} > /sys/class/power_supply/BAT?/charge_control_end_threshold'";
       };
     };
   };