diff --git a/src/tools/hidpp-list-features.cpp b/src/tools/hidpp-list-features.cpp
index 8d36e97..e255615 100644
--- a/src/tools/hidpp-list-features.cpp
+++ b/src/tools/hidpp-list-features.cpp
@@ -48,6 +48,7 @@ static const std::map<uint16_t, const char *> HIDPP20Features = {
 	{ 0x00d0, "DFU" },
 	{ 0x1000, "Battery status" },
 	{ 0x1001, "Battery voltage" },
+	{ 0x1004, "Unified battery" },
 	{ 0x1010, "Charging control" },
 	{ 0x1300, "LED control" },
 	{ 0x1800, "Generic Test" },