diff --git a/check_home_assistant_state.py b/check_home_assistant_state.py
index 6a45dbe..193dfd5 100755
--- a/check_home_assistant_state.py
+++ b/check_home_assistant_state.py
@@ -16,6 +16,8 @@ _log = logging.getLogger("nagiosplugin")
 class Entities(nagiosplugin.Resource):
     url: str
     token: str
+    min: float
+    max: float
 
     def hass_get(self, endpoint: str) -> requests.Response:
         headers = {
@@ -47,9 +49,9 @@ class Entities(nagiosplugin.Resource):
                     state["entity_id"],
                     float(state["state"]) if state["state"].isnumeric() else -1,
                     uom=state["attributes"].get("unit_of_measurement"),
-                    min=0,
-                    max=100,
                     context="battery",
+                    min=self.min,
+                    max=self.max,
                 )
 
 
@@ -78,12 +80,27 @@ def main():
         required=True,
         help="return critical if battery percentage is outside RANGE",
     )
+    argp.add_argument(
+        "--min",
+        type=float,
+        help="Min for performance data",
+    )
+    argp.add_argument(
+        "--max",
+        type=float,
+        help="Max for performance data",
+    )
 
     args = argp.parse_args()
 
     check = nagiosplugin.Check(
-        Entities(args.url, args.token),
-        nagiosplugin.ScalarContext("battery", args.warning, args.critical),
+        Entities(
+            args.url,
+            args.token,
+            args.min,
+            args.max,
+        ),
+        nagiosplugin.ScalarContext(args.device_class, args.warning, args.critical),
     )
     check.main(args.verbose)