diff --git a/server/assets/donecharging.wav b/server/assets/donecharging.wav
new file mode 100644
index 00000000..cf8c4a75
Binary files /dev/null and b/server/assets/donecharging.wav differ
diff --git a/server/src/services/audioForwardService/chargeCompleteSound.js b/server/src/services/audioForwardService/chargeCompleteSound.js
index e144758c..484645e8 100644
--- a/server/src/services/audioForwardService/chargeCompleteSound.js
+++ b/server/src/services/audioForwardService/chargeCompleteSound.js
@@ -4,7 +4,7 @@
 const path = require('path');
 const { subscribe } = require('../eventBus');
 
-const DONE_CHARGING_SOUND_PATH = path.resolve(__dirname, '..', '..', '..', 'public', 'donecharging.wav');
+const DONE_CHARGING_SOUND_PATH = path.resolve(__dirname, '..', '..', '..', 'assets', 'donecharging.wav');
 
 function registerChargeCompleteSound(deps) {
   const {
@@ -12,22 +12,18 @@ function registerChargeCompleteSound(deps) {
     playServerAudioFile,
   } = deps;
 
-  subscribe('battery.unlocked', (event = {}) => {
+  subscribe('battery.chargeComplete', (event = {}) => {
     const roverId = String(event?.payload?.roverId || '').trim();
     if (!roverId) return;
 
     try {
-      // battery.unlocked is the existing server-side definition of "done
-      // charging" because it only fires after the battery manager has waited
-      // through its full charge-release policy. Playing from this event avoids
-      // duplicating charging thresholds or raw sensor-state guesses here.
       playServerAudioFile(roverId, DONE_CHARGING_SOUND_PATH, {
         source: 'charge-complete',
       });
-      logger.info('Played charging complete sound', { roverId, filePath: DONE_CHARGING_SOUND_PATH });
+      logger.info('Started charging complete sound', { roverId, filePath: DONE_CHARGING_SOUND_PATH });
     } catch (err) {
       // A missing/offline rover or unavailable ffmpeg should not affect the
-      // battery manager's unlock decision. The sound is an announcement layered
+      // battery manager's processing. The sound is an announcement layered
       // on top of the state transition, so failures are logged and contained.
       logger.warn('Failed to play charging complete sound', {
         roverId,
diff --git a/server/src/services/batteryManager/index.js b/server/src/services/batteryManager/index.js
index 06ddd6f1..485c9038 100644
--- a/server/src/services/batteryManager/index.js
+++ b/server/src/services/batteryManager/index.js
@@ -30,6 +30,7 @@ function getState(roverId) {
       dockedCharging: false,
       charging: false,
       batteryLocked: false,
+      completionAnnounced: false,
       waitingSince: null,
     });
   }
@@ -143,6 +144,18 @@ function handleSensorEvent({ roverId, sensors, batteryState }) {
     (batteryState?.charge != null && fullThreshold != null && batteryState.charge >= fullThreshold) ||
     (batteryState?.percent != null && batteryState.percent >= 0.99);
 
+  // Announce once per dock visit, independently of the charging lock. Keep the
+  // latch at 100% so small charge fluctuations cannot repeat the sound.
+  if (!onDock) state.completionAnnounced = false;
+  if (onDock && batteryState?.percentDisplay >= 100 && !state.completionAnnounced) {
+    state.completionAnnounced = true;
+    publishEvent({
+      source: 'batteryManager',
+      type: 'battery.chargeComplete',
+      payload: { roverId, batteryState },
+    });
+  }
+
   const needsCharge = state.warned;
 
   if (dockedCharging && lockable && needsCharge && !state.batteryLocked && !isFull && !waitingLongEnough) {