As I had the same issue (on different hardware) and it seems as the
value at /sys/class/power_supply/BAT0/current_now contains a negative
values which is interpreted as 0.
The attached simple patch worked fine for me.
--- lxpanel-0.5.8.orig/src/plugins/batt/batt_sys.c
+++ lxpanel-0.5.8/src/plugins/batt/batt_sys.c
@@ -160,7 +160,8 @@ void battery_update( battery *b ) {
b->state = "available";
}
else if ( strcmp("current_now", sys_file ) == 0 ) {
- b->present_rate = get_unit_value((gchar*) file_content) / 1000;
+ int d = get_unit_value((gchar*) file_content);
+ b->present_rate = d != -1 ? abs(d) / 1000 : 0;
}
else if ( strcmp("charge_full", sys_file ) == 0 ) {
b->last_capacity = get_unit_value((gchar*) file_content) / 1000;
