diff -Naur dockapps.orig/libacpi.c dockapps/libacpi.c
--- dockapps.orig/libacpi.c	2015-01-12 11:24:15.000000000 +0100
+++ dockapps/libacpi.c	2020-05-29 22:33:52.526826841 +0200
@@ -17,6 +17,9 @@
 #define SYSFS_DATA_SOURCE   1
 static int data_source;
 
+battery_t batteries[MAXBATT];
+int verbosity;
+
 /* local proto */
 int acpi_get_design_cap(int batt);
 
diff -Naur dockapps.orig/libacpi.h dockapps/libacpi.h
--- dockapps.orig/libacpi.h	2015-01-12 11:24:15.000000000 +0100
+++ dockapps/libacpi.h	2020-05-29 22:33:36.393811163 +0200
@@ -128,8 +128,8 @@
 
 
 /* Since these /are/ needed here . . . */
-battery_t batteries[MAXBATT];
-int verbosity;
+extern battery_t batteries[MAXBATT];
+extern int verbosity;
 
 /* check if apm/acpi is enabled, etc */
 int power_init(global_t *globals);