diff --git a/src/init.rs b/src/init.rs
index 104dd7092..398538f73 100644
--- a/src/init.rs
+++ b/src/init.rs
@@ -167,8 +167,8 @@ if [[ $preexec_functions ]]; then
     preexec_functions+=(starship_preexec)
     precmd_functions+=(starship_precmd)
 else
-# We want to avoid destroying an existing DEBUG hook. If we detect one, create 
-# a new function that runs both the existing function AND our function, then 
+# We want to avoid destroying an existing DEBUG hook. If we detect one, create
+# a new function that runs both the existing function AND our function, then
 # re-trap DEBUG to use this new function. This prevents a trap clobber.
     dbg_trap="$(trap -p DEBUG | cut -d' ' -f3 | tr -d \')"
     if [[ -z "$dbg_trap" ]]; then
@@ -255,4 +255,5 @@ function fish_prompt
     set -l starship_duration (math --scale=0 "$CMD_DURATION / 1000")
     ## STARSHIP ## prompt --status=$exit_code --cmd-duration=$starship_duration --jobs=(count (jobs -p))
 end
+export STARSHIP_SHELL="fish"
 "##;
diff --git a/src/modules/battery.rs b/src/modules/battery.rs
index 78ea1813d..800fb6d23 100644
--- a/src/modules/battery.rs
+++ b/src/modules/battery.rs
@@ -8,6 +8,13 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     const BATTERY_CHARGING: &str = "⇡";
     const BATTERY_DISCHARGING: &str = "⇣";
     const BATTERY_THRESHOLD: f32 = 10.0;
+    // TODO: Update when v1.0 printing refactor is implemented to only
+    // print escapes in a prompt context.
+    let shell = std::env::var("STARSHIP_SHELL").unwrap_or_default();
+    let percentage_char = match shell.as_str() {
+        "zsh" => "%%", // % is an escape in zsh, see PROMPT in `man zshmisc`
+        _ => "%",
+    };
 
     let battery_status = get_battery_status()?;
     let BatteryStatus { state, percentage } = battery_status;
@@ -42,7 +49,7 @@ pub fn module<'a>(context: &'a Context) -> Option<Module<'a>> {
     let mut percent_string = Vec::<String>::with_capacity(2);
     // Round the percentage to a whole number
     percent_string.push(percentage.round().to_string());
-    percent_string.push("%".to_string());
+    percent_string.push(percentage_char.to_string());
     module.new_segment("percentage", percent_string.join("").as_ref());
 
     Some(module)