diff --git a/src/rn-dy-glucose-driver.js b/src/rn-dy-glucose-driver.js
index 334c9a3..13c5cd0 100755
--- a/src/rn-dy-glucose-driver.js
+++ b/src/rn-dy-glucose-driver.js
@@ -335,7 +335,7 @@ export default class RNDYGlucoseDriver {
             this._eventMap[DYG_ON_GET_BATTERY] = (deviceInfo) => {
                 console.log(TAG, 'resolve ' + DYG_ON_GET_BATTERY);
                 const { value } = deviceInfo;
-                resolve(percent);
+                resolve(value);
             }
         });
         return this._mixTimeoutPromise(devicePromise);