From 0d82cfb34fbfb5a2157bcdb4d8f31dfc25d0a6a1 Mon Sep 17 00:00:00 2001
From: Tang ZZ <tom@radxa.com>
Date: Fri, 14 Aug 2026 07:00:01 +0800
Subject: [PATCH] docs(x/x4): add FAQ on power-in header voltage (12V)

Clarify that the on-board power-in header accepts 12V DC input,
consistent with the USB Type-C PD 12V spec. Addresses issue #600.
---
 docs/x/x4/faq.md                                           | 6 ++++++
 i18n/en/docusaurus-plugin-content-docs/current/x/x4/faq.md | 6 ++++++
 2 files changed, 12 insertions(+)

diff --git a/docs/x/x4/faq.md b/docs/x/x4/faq.md
index 744e6eb87..5a2cf929b 100644
--- a/docs/x/x4/faq.md
+++ b/docs/x/x4/faq.md
@@ -3,3 +3,9 @@ sidebar_position: 70
 ---
 
 # FAQ
+
+## 板载电源输入接口需要多少伏电压？
+
+- Radxa X4 板载电源输入接口（Power In）为 **12V 直流输入**，与 USB Type-C PD 接口的 12V 供电规格一致。
+- 推荐使用支持 USB Type-C PD 协议（12V，电流 ≥ 2.5A）的电源适配器，例如 [Radxa Power PD30W](http://radxa.com/products/accessories/power-pd-30w)。
+- 请勿向该接口输入 5V 电压，否则可能导致系统无法正常启动或供电不足。
diff --git a/i18n/en/docusaurus-plugin-content-docs/current/x/x4/faq.md b/i18n/en/docusaurus-plugin-content-docs/current/x/x4/faq.md
index 744e6eb87..30ca514a7 100644
--- a/i18n/en/docusaurus-plugin-content-docs/current/x/x4/faq.md
+++ b/i18n/en/docusaurus-plugin-content-docs/current/x/x4/faq.md
@@ -3,3 +3,9 @@ sidebar_position: 70
 ---
 
 # FAQ
+
+## What voltage should be supplied to the on-board power-in header?
+
+- The on-board power-in header of Radxa X4 accepts **12V DC input**, consistent with the 12V USB Type-C PD power specification.
+- It is recommended to use a USB Type-C PD power adapter (12V, current ≥ 2.5A), such as the [Radxa Power PD30W](http://radxa.com/products/accessories/power-pd-30w).
+- Do not supply 5V to this header, otherwise the board may fail to boot properly or suffer from insufficient power.