diff --git a/src/components/OtaModal.vue b/src/components/OtaModal.vue
index b548612..cd94861 100644
--- a/src/components/OtaModal.vue
+++ b/src/components/OtaModal.vue
@@ -1,5 +1,10 @@
 <script setup>
 import { computed } from "vue";
+import { getDeviceBatteryAPI } from "@/apis";
+
+const OTA_MIN_BATTERY = 20;
+const OTA_LOW_BATTERY_TEXT = "电量不足 50%，暂不支持 OTA 升级";
+const OTA_OFFLINE_TEXT = "请先开启智能弓";
 
 const props = defineProps({
   visible: {
@@ -42,6 +47,32 @@ const isSuccess = computed(() => props.state === "update_success");
 const isFailure = computed(() => props.state === "update_failure");
 // Clamp progress to keep the progress bar width within its container.
 const progressValue = computed(() => Math.min(100, Math.max(0, Number(props.progress) || 0)));
+
+// 点击立即更新前先校验设备在线状态，再校验设备电量。
+const handleUpdateClick = async () => {
+  try {
+    const deviceStatus = await getDeviceBatteryAPI();
+    if (deviceStatus?.online !== true) {
+      uni.showToast({
+        title: OTA_OFFLINE_TEXT,
+        icon: "none",
+      });
+      return;
+    }
+
+    if (Number(deviceStatus?.battery) <= OTA_MIN_BATTERY) {
+      uni.showToast({
+        title: OTA_LOW_BATTERY_TEXT,
+        icon: "none",
+      });
+      return;
+    }
+  } catch (err) {
+    emit("update");
+    return;
+  }
+  emit("update");
+};
 </script>
 
 <template>
@@ -91,7 +122,7 @@ const progressValue = computed(() => Math.min(100, Math.max(0, Number(props.prog
           <block v-if="isNewVersion">
             <image src="../static/ota/new-ver.png" mode="aspectFit" class="new-ver-img" />
             <view v-if="version" class="version-tag-wrap">
-              <image src="../static/ota/ota-ver.png" mode="aspectFill" class="version-tag-bg-img" />
+              <image src="../static/ota/ota-ver.png" mode="aspectFit" class="version-tag-bg-img" />
               <text class="version-tag">{{ version }}</text>
             </view>
             <!-- 副标题：如“新版本将优化智能弓体验”，离下方详情 12rpx -->
@@ -99,7 +130,7 @@ const progressValue = computed(() => Math.min(100, Math.max(0, Number(props.prog
             <!-- 详细说明：如“升级前请确保：...” -->
             <text v-if="changelog" class="changelog-text">{{ changelog }}</text>
             <view class="btn-group">
-              <view class="primary-btn" @click="emit('update')">
+              <view class="primary-btn" @click="handleUpdateClick">
                 <text class="primary-btn-text">立即更新</text>
               </view>
               <text v-if="!forceUpdate" class="skip-text" @click="emit('skip')">暂不更新</text>
@@ -270,6 +301,8 @@ const progressValue = computed(() => Math.min(100, Math.max(0, Number(props.prog
   display: flex;
   align-items: center;
   justify-content: center;
+  width: 116rpx;
+  height: 44rpx;
   /* 离标题图 -10rpx，左边距 50rpx，离下方副标题 22rpx */
   margin-top: -10rpx;
   margin-left: 50rpx;
diff --git a/src/pages/ota-wifi.vue b/src/pages/ota-wifi.vue
index 38663c4..23d30f2 100644
--- a/src/pages/ota-wifi.vue
+++ b/src/pages/ota-wifi.vue
@@ -54,6 +54,8 @@ let wifiConnectPollCount = 0;
 const WIFI_CONNECT_POLL_INTERVAL = 2000;
 const WIFI_CONNECT_MAX_POLL_COUNT = 15;
 const WIFI_CONNECT_FAILED_TEXT = "连接失败，请检查WiFi密码或WiFi状态";
+const OTA_MIN_BATTERY = 20;
+const OTA_LOW_BATTERY_TEXT = "电量不足 50%，暂不支持 OTA 升级";
 // 控制授权拒绝弹窗显示/隐藏
 const wifiAuthDeniedVisible = ref(false);
 
@@ -437,7 +439,7 @@ const pollUpdateTaskStatus = (taskId) => {
 // 判断设备是否满足 OTA 更新条件，不满足时返回精确提示文案。
 const getUpdateDisabledReason = (deviceStatus) => {
   if (deviceStatus?.online !== true) return "请先开启智能弓";
-  if (Number(deviceStatus?.battery) <= 20) return "设备电量不足，请充电至 20% 以上后再更新";
+  if (Number(deviceStatus?.battery) <= OTA_MIN_BATTERY) return OTA_LOW_BATTERY_TEXT;
   if (String(deviceStatus?.netType || "").toLowerCase() !== "wifi") return "设备当前未连接 WiFi，请先连接 WiFi 后再更新";
   return "";
 };