diff --git a/TuyaMCU.md b/TuyaMCU.md
index f38b0eae..b3cb9687 100644
--- a/TuyaMCU.md
+++ b/TuyaMCU.md
@@ -81,6 +81,7 @@ Power (in deci Watt) | 31 |
 Current (in milli Amps) | 32 |
 Voltage (in deci Volt) | 33 |
 Relay Inverted1 to Relay Inverted8 | 41 to 48 | Map only to dpId with on / off function
+Battery powered sensor mode | 51 | 
 
 > This component is under active development which means the function list may expand in the future.