diff --git a/zephcore/boards/esp32/heltec_wifi_lora32_v43/board.conf b/zephcore/boards/esp32/heltec_wifi_lora32_v43/board.conf
index aaf038b..cc65409 100644
--- a/zephcore/boards/esp32/heltec_wifi_lora32_v43/board.conf
+++ b/zephcore/boards/esp32/heltec_wifi_lora32_v43/board.conf
@@ -23,3 +23,8 @@ CONFIG_ZEPHCORE_SX126X_HELTEC_REG_PATCH=y
 # Measured (MeshCore issue #1708, GC1109 data — KCT8103L similar): TX=18 → ~27 dBm
 # radiated, practical efficiency peak. TX=10 → ~20 dBm; TX=22 saturates same as TX=18.
 CONFIG_ZEPHCORE_DEFAULT_TX_POWER_DBM=12
+
+# Single button, ENTER emitted via a zephyr,input-longpress filter (see
+# board.overlay): the default 500ms double-press confirm window (shutdown/
+# DFU/offgrid) is too short for two ~1s holds, see Kconfig help text.
+CONFIG_ZEPHCORE_UI_CONFIRM_WINDOW_MS=3000
diff --git a/zephcore/boards/esp32/heltec_wireless_tracker_v2/board.conf b/zephcore/boards/esp32/heltec_wireless_tracker_v2/board.conf
index 8d62d4e..ce2e875 100644
--- a/zephcore/boards/esp32/heltec_wireless_tracker_v2/board.conf
+++ b/zephcore/boards/esp32/heltec_wireless_tracker_v2/board.conf
@@ -23,3 +23,8 @@ CONFIG_ZEPHCORE_SX126X_HELTEC_REG_PATCH=y
 # the PA enabled. The module is physically capable of higher output; start
 # conservative to avoid overdriving the front end.
 CONFIG_ZEPHCORE_DEFAULT_TX_POWER_DBM=9
+
+# Single button, ENTER emitted via a zephyr,input-longpress filter (see
+# board.overlay): the default 500ms double-press confirm window (shutdown/
+# DFU/offgrid) is too short for two ~1s holds, see Kconfig help text.
+CONFIG_ZEPHCORE_UI_CONFIRM_WINDOW_MS=3000