From 19a97580fc84cda20bd7d9d06d3f25982f9c4b73 Mon Sep 17 00:00:00 2001
From: Nicolas Bougues <nbougues@users.noreply.github.com>
Date: Mon, 4 Dec 2017 08:34:42 +0100
Subject: [PATCH] Set percent unit for battery level so that history displays
 properly; edited variable name for consistency (#10932)

---
 homeassistant/components/sensor/tesla.py | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)

diff --git a/homeassistant/components/sensor/tesla.py b/homeassistant/components/sensor/tesla.py
index 824fec41580270..3f36a1128d6ded 100644
--- a/homeassistant/components/sensor/tesla.py
+++ b/homeassistant/components/sensor/tesla.py
@@ -39,7 +39,7 @@ class TeslaSensor(TeslaDevice, Entity):
     def __init__(self, tesla_device, controller, sensor_type=None):
         """Initialisation of the sensor."""
         self.current_value = None
-        self._temperature_units = None
+        self._unit = None
         self.last_changed_time = None
         self.type = sensor_type
         super().__init__(tesla_device, controller)
@@ -59,7 +59,7 @@ def state(self):
     @property
     def unit_of_measurement(self):
         """Return the unit_of_measurement of the device."""
-        return self._temperature_units
+        return self._unit
 
     def update(self):
         """Update the state from the sensor."""
@@ -74,8 +74,9 @@ def update(self):
             tesla_temp_units = self.tesla_device.measurement
 
             if tesla_temp_units == 'F':
-                self._temperature_units = TEMP_FAHRENHEIT
+                self._unit = TEMP_FAHRENHEIT
             else:
-                self._temperature_units = TEMP_CELSIUS
+                self._unit = TEMP_CELSIUS
         else:
             self.current_value = self.tesla_device.battery_level()
+            self._unit = "%"