diff --git a/src/screen/PowerSource/components/InstrumentCluster.js b/src/screen/PowerSource/components/InstrumentCluster.js
index a402a5c6..836ecd77 100644
--- a/src/screen/PowerSource/components/InstrumentCluster.js
+++ b/src/screen/PowerSource/components/InstrumentCluster.js
@@ -52,7 +52,7 @@ const Settings = props => {
   };
 
   const inputCheck = value => {
-    let regex = /^(?:\-)?[0-9]*(\.[0-9]{0,2})?$/;
+    let regex = /^(?:)?[0-9]*(\.[0-9]{0,2})?$/;
     return regex.test(value);
   };