diff --git a/data/igate_conf.json b/data/igate_conf.json
index 2e08967..6756636 100644
--- a/data/igate_conf.json
+++ b/data/igate_conf.json
@@ -49,7 +49,7 @@
     "battery": {
         "sendInternalVoltage": false,
         "monitorInternalVoltage": false,
-        "internalSleepVoltage": 3.0,
+        "internalSleepVoltage": 2.9,
         "sendExternalVoltage": false,
         "externalVoltagePin": 34,
         "monitorExternalVoltage": false,
diff --git a/data_embed/index.html b/data_embed/index.html
index 7b64e65..8f07079 100644
--- a/data_embed/index.html
+++ b/data_embed/index.html
@@ -1012,7 +1012,7 @@
                                                     placeholder="3.0"
                                                     class="form-control"
                                                     step="0.1"
-                                                    min="3.0"
+                                                    min="2.9"
                                                     max="3.7"
                                                 />
                                                 <span class="input-group-text"
diff --git a/src/configuration.cpp b/src/configuration.cpp
index 1e22adc..b5c2440 100644
--- a/src/configuration.cpp
+++ b/src/configuration.cpp
@@ -171,7 +171,7 @@ bool Configuration::readFile() {
 
         battery.sendInternalVoltage     = data["battery"]["sendInternalVoltage"] | false;
         battery.monitorInternalVoltage  = data["battery"]["monitorInternalVoltage"] | false;
-        battery.internalSleepVoltage    = data["battery"]["internalSleepVoltage"] | 3.0;
+        battery.internalSleepVoltage    = data["battery"]["internalSleepVoltage"] | 2.9;
 
         battery.sendExternalVoltage     = data["battery"]["sendExternalVoltage"] | false;
         battery.externalVoltagePin      = data["battery"]["externalVoltagePin"] | 34;
@@ -293,7 +293,7 @@ void Configuration::init() {
 
     battery.sendInternalVoltage     = false;
     battery.monitorInternalVoltage  = false;
-    battery.internalSleepVoltage    = 3.0;
+    battery.internalSleepVoltage    = 2.9;
 
     battery.sendExternalVoltage     = false;
     battery.externalVoltagePin      = 34;