diff --git a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
index f0008774..2d71c275 100644
--- a/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
+++ b/mpmaster/src/main/java/com/xypower/mpmaster/AppMaster.java
@@ -249,8 +249,8 @@ public class AppMaster {
             }
 
             try {
-                String battary = getBatteryVoltage() + "V/" + getChargingBatteryVoltage() + "V";
-                postParams.add(new Pair<String, String>("battary", battary));
+                String battery = getBatteryVoltage() + "V/" + getChargingBatteryVoltage() + "V";
+                postParams.add(new Pair<String, String>("battery", battery));
             } catch (Exception ex) {
                 ex.printStackTrace();
             }