2 files changed, 10 insertions, 1 deletions
diff --git a/config.h b/config.h
index 2d4e6a4..b8a5264 100644
--- a/config.h
+++ b/config.h
@@ -1,7 +1,9 @@
 /* See LICENSE file for copyright and license details. */
 
 /* interval between updates (in ms) */
-const unsigned int interval = 1000;
+const unsigned int interval_perf = 1000; // performance
+const unsigned int interval_psav = 5000; // power save
+unsigned int interval;
 
 /* text to show if no value can be retrieved */
 static const char unknown_str[] = "n/a";
diff --git a/slstatus.c b/slstatus.c
index 88204de..d5ac2f8 100644
--- a/slstatus.c
+++ b/slstatus.c
@@ -90,6 +90,13 @@ main(int argc, char *argv[])
 		if (clock_gettime(CLOCK_MONOTONIC, &start) < 0)
 			die("clock_gettime:");
 
+		if (pscanf("/sys/class/power_supply/AC/online", "%ud", &interval) == 1)
+			interval = interval ? interval_perf : interval_psav;
+		else {
+			interval = interval_perf;
+		}
+		printf("Interval: %ud\n", interval);
+
 		status[0] = '\0';
 		for (i = len = 0; i < LEN(args); i++) {