Add Huawei LTE battery sensor (#41668)

homeassistant/components/huawei_lte/sensor.py

@@ -8,6 +8,7 @@ from typing import Callable, Dict, List, NamedTuple, Optional, Pattern, Tuple, U
 import attr
 
 from homeassistant.components.sensor import (
+    DEVICE_CLASS_BATTERY,
     DEVICE_CLASS_SIGNAL_STRENGTH,
     DOMAIN as SENSOR_DOMAIN,
 )
@@ -16,6 +17,7 @@ from homeassistant.const import (
     CONF_URL,
     DATA_BYTES,
     DATA_RATE_BYTES_PER_SECOND,
+    PERCENTAGE,
     STATE_UNKNOWN,
     TIME_SECONDS,
 )
@@ -189,9 +191,15 @@ SENSOR_META: Dict[Union[str, Tuple[str, str]], SensorMeta] = {
     ),
     KEY_MONITORING_STATUS: SensorMeta(
         include=re.compile(
-            r"^(currentwifiuser|(primary|secondary).*dns)$", re.IGNORECASE
+            r"^(batterypercent|currentwifiuser|(primary|secondary).*dns)$",
+            re.IGNORECASE,
         )
     ),
+    (KEY_MONITORING_STATUS, "BatteryPercent"): SensorMeta(
+        name="Battery",
+        device_class=DEVICE_CLASS_BATTERY,
+        unit=PERCENTAGE,
+    ),
     (KEY_MONITORING_STATUS, "CurrentWifiUser"): SensorMeta(
         name="WiFi clients connected", icon="mdi:wifi"
     ),