diff --git a/APP/app_adc.c b/APP/app_adc.c
index 96d4059..cc583a6 100644
--- a/APP/app_adc.c
+++ b/APP/app_adc.c
@@ -358,6 +358,7 @@ static void app_adc_volume_process(void)
 static uint16_t s_vbat_raw = 0;
 static uint8_t  s_vbat_valid = 0;
 static uint8_t  s_charge_ui_allowed = 0;
+static uint8_t  s_pct_shown_valid = 0;
 
 /* 高于 6.8V 才允许点亮关机充电页；未采样视为不允许 */
 uint8_t app_adc_charge_ui_allowed(void)
@@ -396,6 +397,7 @@ void app_adc_init(void)
     s_vbat_raw = 0;
     s_vbat_valid = 0;
     s_charge_ui_allowed = 0;
+    s_pct_shown_valid = 0;
 }
 
 /* 采样：读 ADC + 滑动平均 */
@@ -409,6 +411,25 @@ static void app_adc_battery_do_sample(void)
     bat_index = (bat_index + 1) % BAT_SAMPLE_COUNT;
 }
 
+/* 显示电量：四舍五入到 5%，之后每次最多升/降 5，避免一下掉一截。关机仍看原始电压。 */
+static uint8_t bat_display_percent(uint8_t raw_pct)
+{
+    uint8_t q = (uint8_t)((((uint16_t)raw_pct + 2u) / 5u) * 5u);
+
+    if (q > 100u)
+        q = 100u;
+    if (!s_pct_shown_valid)
+    {
+        s_pct_shown_valid = 1u;
+        return q;
+    }
+    if ((uint16_t)q + 5u < percentage)
+        return (uint8_t)(percentage - 5u);
+    if (q > (uint8_t)(percentage + 5u))
+        return (uint8_t)(percentage + 5u);
+    return q;
+}
+
 /* 上报：映射成百分比，变化才发消息；低于等于 6.8V 触发低电量关机（插着 Type-C 也执行） */
 static void app_adc_battery_report(void)
 {
@@ -437,6 +458,7 @@ static void app_adc_battery_report(void)
         MainTask_Sendmsg(MSG_ID_LOW_BAT_TIP, pct, filtered, 0);
     }
 
+    pct = bat_display_percent(pct);
     pct_changed = (pct != percentage) ? 1u : 0u;
     allow_changed = (allow != s_charge_ui_allowed) ? 1u : 0u;
     s_charge_ui_allowed = allow;
@@ -445,7 +467,7 @@ static void app_adc_battery_report(void)
 
     if (usb_charging_state && !powon)
     {
-        /* 跨过 6.8V 也要通知，否则百分比不变时充电页不会亮或熄 */
+        /* 跨过 6.8V 时通知界面：高于则一直亮，否则 10s 后关屏 */
         if (pct_changed || allow_changed)
             MainTask_Sendmsg(MSG_ID_POWOFF_CHARG, percentage, usb_charging_state, 0);
     }