From a79224aba8b939d6acdc705c5d1c00f06b7b6b65 Mon Sep 17 00:00:00 2001
From: "David F. Mulcahey" <david.mulcahey@me.com>
Date: Fri, 7 Jun 2019 11:02:35 -0400
Subject: [PATCH] Fix ZHA battery level when value is reported via signal
 (#24371)

* fix battery signal
* review comment
---
 homeassistant/components/zha/device_entity.py | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/homeassistant/components/zha/device_entity.py b/homeassistant/components/zha/device_entity.py
index 94fe598b6ec..b3cb19f2c5a 100644
--- a/homeassistant/components/zha/device_entity.py
+++ b/homeassistant/components/zha/device_entity.py
@@ -1,6 +1,7 @@
 """Device entity for Zigbee Home Automation."""
 
 import logging
+import numbers
 import time
 
 from homeassistant.core import callback
@@ -101,6 +102,18 @@ class ZhaDeviceEntity(ZhaEntity):
             # only do this on add to HA because it is static
             await self._async_init_battery_values()
 
+    def async_update_state_attribute(self, key, value):
+        """Update a single device state attribute."""
+        if key == 'battery_level':
+            if not isinstance(value, numbers.Number) or value == -1:
+                return
+            value = value / 2
+            value = int(round(value))
+        self._device_state_attributes.update({
+            key: value
+        })
+        self.async_schedule_update_ha_state()
+
     async def async_update(self):
         """Handle polling."""
         if self._zha_device.last_seen is None: