diff --git a/README.md b/README.md
index d0a816fd..d66d1fa7 100644
--- a/README.md
+++ b/README.md
@@ -24,7 +24,7 @@ Go to [HA community](https://community.home-assistant.io/t/shellies-discovery-sc
 - Shelly Plug
 - Shelly Plug S
 - Shelly RGBW2 (color and white mode)
-- Shelly H&T
+- Shelly H&T (with or without USB adapter)
 - Shelly Smoke
 - Shelly Sense
 - ShellyEM
@@ -102,6 +102,7 @@ automation:
         shellyswitch-334455: 'cover'
         shellyrgbw2-AABB22: 'white'
         shellyrgbw2-CC2211: 'rgbw'
+        shellyht-2200AA: 'ac_power'
 ```
 ## Script arguments
 key | optional | type | default | description
diff --git a/info.md b/info.md
index 88dc6419..673671a7 100644
--- a/info.md
+++ b/info.md
@@ -9,7 +9,7 @@
 - Shelly Plug
 - Shelly Plug S
 - Shelly RGBW2 (color and white mode)
-- Shelly H&T
+- Shelly H&T (with or without USB adapter)
 - Shelly Smoke
 - Shelly Sense
 - ShellyEM
@@ -64,7 +64,7 @@ automation:
       data:
         topic: shellies/command
         payload: announce
-        
+
   - id: 'shellies_discovery'
     alias: 'Shellies Discovery'
     trigger:
@@ -85,6 +85,7 @@ automation:
         shellyswitch-334455: 'cover'
         shellyrgbw2-AABB22: 'white'
         shellyrgbw2-CC2211: 'rgbw'
+        shellyht-2200AA: 'ac_power'
 ```
 ## Script arguments
 key | optional | type | default | description
diff --git a/python_scripts/shellies_discovery.py b/python_scripts/shellies_discovery.py
index 98679f8f..03390281 100644
--- a/python_scripts/shellies_discovery.py
+++ b/python_scripts/shellies_discovery.py
@@ -57,6 +57,7 @@
       shellyswitch-334455: 'cover'
       shellyrgbw2-AABB22: 'white'
       shellyrgbw2-CC2211: 'rgbw'
+      shellyht-2200AA: 'ac_power'
 
 qos - maximum QoS level of the topics, this is optional argument, default is 0 (integer)
 
@@ -71,6 +72,8 @@
 shellyrgbw2-CC2211: 'rgbw' - means that Shelly RGBW2 works in color-mode
 (default)
 
+shellyht-2200AA: 'ac_power' - means that ShellyH&T is AC powered via USB adapter
+
 You can install script manually or via HACS.
 """
 
@@ -149,7 +152,9 @@
 ATTR_OFF = "off"
 ATTR_TRUE_FALSE_PAYLOAD = {ATTR_ON: "true", ATTR_OFF: "false"}
 ATTR_1_0_PAYLOAD = {ATTR_ON: "1", ATTR_OFF: "0"}
-ATTR_EXPIRE_AFTER = "43200"
+ATTR_AC_POWER = "ac_power"
+
+expire_after = "43200"
 
 develop = False
 retain = True
@@ -618,6 +623,12 @@
             state_topic = "~{}".format(sensors[sensor_id])
         else:
             state_topic = "~sensor/{}".format(sensors[sensor_id])
+        if data.get(id):
+            if data.get(id) == ATTR_AC_POWER:
+                expire_after = "7200"
+        elif data.get(id.lower()):
+            if data.get(id.lower()) == ATTR_AC_POWER:
+                expire_after = "7200"
         if battery_powered:
             payload = (
                 '{"name":"' + sensor_name + '",'
@@ -625,7 +636,7 @@
                 '"unit_of_meas":"' + sensors_units[sensor_id] + '",'
                 '"dev_cla":"' + sensors_classes[sensor_id] + '",'
                 '"val_tpl":"' + sensors_templates[sensor_id] + '",'
-                '"exp_aft":"' + ATTR_EXPIRE_AFTER + '",'
+                '"exp_aft":"' + expire_after + '",'
                 '"uniq_id":"' + unique_id + '",'
                 '"qos":"' + str(qos) + '",'
                 '"dev": {"ids": ["' + mac + '"],'