diff --git a/test/plugins/battery.plugin.bats b/test/plugins/battery.plugin.bats
index 916855eb..d7313742 100644
--- a/test/plugins/battery.plugin.bats
+++ b/test/plugins/battery.plugin.bats
@@ -22,6 +22,11 @@ function setup_command_exists {
   }
 }
 
+#######################
+#
+# pmset
+#
+
 function setup_pmset {
   percent="$1"
 
@@ -65,3 +70,150 @@ function setup_pmset {
   run battery_percentage
   assert_output "4"
 }
+
+#######################
+#
+# acpi
+#
+
+function setup_acpi {
+  percent="$1"
+
+  function acpi {
+    echo "-InternalBattery-0 (id=12345)	""${percent}""; discharging; 16:00 remaining present: true"
+  }
+}
+
+@test 'plugins battery: battery-percentage with acpi, 100%' {
+  setup_command_exists "acpi"
+
+  setup_acpi "100%"
+
+  run battery_percentage
+  assert_output "100"
+}
+
+@test 'plugins battery: battery-percentage with acpi, 98%' {
+  setup_command_exists "acpi"
+
+  setup_acpi "98%"
+
+  run battery_percentage
+  assert_output "98"
+}
+
+@test 'plugins battery: battery-percentage with acpi, 98.5%' {
+  setup_command_exists "acpi"
+
+  setup_acpi "98.5%"
+
+  run battery_percentage
+  assert_output "98"
+}
+
+@test 'plugins battery: battery-percentage with acpi, 4%' {
+  setup_command_exists "acpi"
+
+  setup_acpi "4%"
+
+  run battery_percentage
+  assert_output "4"
+}
+
+#######################
+#
+# upower
+#
+
+function setup_upower {
+  percent="$1"
+
+  function upower {
+    echo "-InternalBattery-0 (id=12345)	""${percent}""; discharging; 16:00 remaining present: true"
+  }
+}
+
+@test 'plugins battery: battery-percentage with upower, 100%' {
+  setup_command_exists "upower"
+
+  setup_upower "100%"
+
+  run battery_percentage
+  assert_output "100"
+}
+
+@test 'plugins battery: battery-percentage with upower, 98%' {
+  setup_command_exists "upower"
+
+  setup_upower "98%"
+
+  run battery_percentage
+  assert_output "98"
+}
+
+@test 'plugins battery: battery-percentage with upower, 98.5%' {
+  setup_command_exists "upower"
+
+  setup_upower "98.5%"
+
+  run battery_percentage
+  assert_output "98"
+}
+
+@test 'plugins battery: battery-percentage with upower, 4%' {
+  setup_command_exists "upower"
+
+  setup_upower "4%"
+
+  run battery_percentage
+  assert_output "4"
+}
+
+#######################
+#
+# ioreg
+#
+
+function setup_ioreg {
+  percent="$1"
+
+  function ioreg {
+    printf "\"MaxCapacity\" = 100\n\"CurrentCapacity\" = %s" "${percent}"
+  }
+}
+
+@test 'plugins battery: battery-percentage with ioreg, 100%' {
+  setup_command_exists "ioreg"
+
+  setup_ioreg "100%"
+
+  run battery_percentage
+  assert_output "100"
+}
+
+@test 'plugins battery: battery-percentage with ioreg, 98%' {
+  setup_command_exists "ioreg"
+
+  setup_ioreg "98%"
+
+  run battery_percentage
+  assert_output "98"
+}
+
+@test 'plugins battery: battery-percentage with ioreg, 98.5%' {
+  setup_command_exists "ioreg"
+
+  setup_ioreg "98.5%"
+
+  run battery_percentage
+  assert_output "98"
+}
+
+@test 'plugins battery: battery-percentage with ioreg, 4%' {
+  setup_command_exists "ioreg"
+
+  setup_ioreg "4%"
+
+  run battery_percentage
+  assert_output "4"
+}