diff --git a/tangara-mainboard/power.kicad_sch b/tangara-mainboard/power.kicad_sch
index 3f4fbf0..84cfdb1 100644
--- a/tangara-mainboard/power.kicad_sch
+++ b/tangara-mainboard/power.kicad_sch
@@ -3464,6 +3464,9 @@
     (property "Datasheet" "http://www.diodes.com/_files/datasheets/ds11005.pdf" (at 187.452 50.8 0)
       (effects (font (size 1.27 1.27)) hide)
     )
+    (property "MPN" "BAT54C" (at 185.42 50.8 0)
+      (effects (font (size 1.27 1.27)) hide)
+    )
     (pin "1" (uuid 2ebb8adf-2278-4cc9-a14c-3e1b4e5ec608))
     (pin "2" (uuid 098b117c-d44c-431a-ada5-11a3f5f0d0a8))
     (pin "3" (uuid 9c5bedaa-6e77-46e0-abb6-88ca262b994e))