diff --git a/power.sh b/power.sh
new file mode 100755
index 0000000..a7cacdd
--- /dev/null
+++ b/power.sh
@@ -0,0 +1,65 @@
+#!/usr/bin/env bash
+
+set -e
+
+./ectool.sh info
+
+header=1
+if [ -e power.csv ]
+then
+    header=0
+fi
+
+while true
+do
+    if [ "${header}" == "1" ]
+    then
+        F="Time    "
+        F="${F}\tBAT V"
+        F="${F}\tBAT A"
+        F="${F}\tCPU W"
+        F="${F}\tCPU C"
+        F="${F}\tFAN %"
+    else
+        F="$(date "+%T")"
+
+        uV="$(cat /sys/class/power_supply/BAT0/voltage_now)"
+        V="$(echo "${uV}/1000000" | bc -lq)"
+        F="${F}\t$(printf "%.2f" "${V}")"
+
+        uA="$(cat /sys/class/power_supply/BAT0/current_now)"
+        A="$(echo "${uA}/1000000" | bc -lq)"
+        F="${F}\t$(printf "%.2f" "${A}")"
+
+        last_E="$(cat /sys/class/powercap/intel-rapl\:0/energy_uj)"
+        sleep 1
+        next_E="$(cat /sys/class/powercap/intel-rapl\:0/energy_uj)"
+        W="$(echo "(${next_E} - ${last_E})/1000000" | bc -lq)"
+        F="${F}\t$(printf "%.1f" "${W}")"
+
+        T="$(cat /sys/devices/platform/coretemp.0/hwmon/hwmon*/temp1_input)"
+        C="$(echo "${T}/1000" | bc -lq)"
+        F="${F}\t$(printf "%.1f" "${C}")"
+
+        D="$(sudo tool/target/release/system76_ectool fan 0)"
+        P="$(echo "(${D} * 100)/255" | bc -lq)"
+        F="${F}\t$(printf "%.0f" "${P}")"
+    fi
+
+    for file in /sys/devices/system/cpu/cpu*/cpufreq/scaling_cur_freq
+    do
+        if [ "${header}" == "1" ]
+        then
+            id="$(basename "$(dirname "$(dirname "${file}")")")"
+            F="${F}\t${id}"
+        else
+            KHz="$(cat "${file}")"
+            MHz="$(echo "${KHz}/1000" | bc -lq)"
+            F="${F}\t$(printf "%.0f" "${MHz}")"
+        fi
+    done
+
+    echo -e "${F}" | tee -a power.csv
+
+    header=0
+done
diff --git a/tool/src/main.rs b/tool/src/main.rs
index 7f48a36..60e89da 100644
--- a/tool/src/main.rs
+++ b/tool/src/main.rs
@@ -282,7 +282,7 @@ unsafe fn fan_get(index: u8) -> Result<(), Error> {
     )?;
 
     let duty = ec.fan_get(index)?;
-    eprintln!("{}", duty);
+    println!("{}", duty);
 
     Ok(())
 }