diff --git a/Android.mk b/Android.mk
index 53bc578..8488334 100755
--- a/Android.mk
+++ b/Android.mk
@@ -363,6 +363,11 @@
 ifneq ($(TW_CUSTOM_BATTERY_PATH),)
 	LOCAL_CFLAGS += -DTW_CUSTOM_BATTERY_PATH=$(TW_CUSTOM_BATTERY_PATH)
 endif
+ifneq ($(TW_BATTERY_SYSFS_WAIT_SECONDS),)
+	LOCAL_CFLAGS += -DTW_BATTERY_SYSFS_WAIT_SECONDS=$(TW_BATTERY_SYSFS_WAIT_SECONDS)
+else
+	LOCAL_CFLAGS += -DTW_BATTERY_SYSFS_WAIT_SECONDS=3
+endif
 ifneq ($(TW_CUSTOM_CPU_TEMP_PATH),)
 	LOCAL_CFLAGS += -DTW_CUSTOM_CPU_TEMP_PATH=$(TW_CUSTOM_CPU_TEMP_PATH)
 endif