diff --git a/src/battle-scene.ts b/src/battle-scene.ts
index f06ae607b0e..6f2217bade3 100644
--- a/src/battle-scene.ts
+++ b/src/battle-scene.ts
@@ -1086,6 +1086,13 @@ export default class BattleScene extends SceneBase {
     }
   }
 
+  getDoubleBattleChance(newWaveIndex: number, playerField: PlayerPokemon[]) {
+    const doubleChance = new Utils.IntegerHolder(newWaveIndex % 10 === 0 ? 32 : 8);
+    this.applyModifiers(DoubleBattleChanceBoosterModifier, true, doubleChance);
+    playerField.forEach(p => applyAbAttrs(DoubleBattleChanceAbAttr, p, null, false, doubleChance));
+    return Math.max(doubleChance.value, 1);
+  }
+
   newBattle(waveIndex?: integer, battleType?: BattleType, trainerData?: TrainerData, double?: boolean): Battle | null {
     const _startingWave = Overrides.STARTING_WAVE_OVERRIDE || startingWave;
     const newWaveIndex = waveIndex || ((this.currentBattle?.waveIndex || (_startingWave - 1)) + 1);
@@ -1139,10 +1146,7 @@ export default class BattleScene extends SceneBase {
 
     if (double === undefined && newWaveIndex > 1) {
       if (newBattleType === BattleType.WILD && !this.gameMode.isWaveFinal(newWaveIndex)) {
-        const doubleChance = new Utils.IntegerHolder(newWaveIndex % 10 === 0 ? 32 : 8);
-        this.applyModifiers(DoubleBattleChanceBoosterModifier, true, doubleChance);
-        playerField.forEach(p => applyAbAttrs(DoubleBattleChanceAbAttr, p, null, false, doubleChance));
-        newDouble = !Utils.randSeedInt(doubleChance.value);
+        newDouble = !Utils.randSeedInt(this.getDoubleBattleChance(newWaveIndex, playerField));
       } else if (newBattleType === BattleType.TRAINER) {
         newDouble = newTrainer?.variant === TrainerVariant.DOUBLE;
       }
diff --git a/src/data/ability.ts b/src/data/ability.ts
index b38d9ea0fb3..fbec5a1e177 100755
--- a/src/data/ability.ts
+++ b/src/data/ability.ts
@@ -165,14 +165,27 @@ export class BlockRecoilDamageAttr extends AbAttr {
   }
 }
 
+/**
+ * Attribute for abilities that increase the chance of a double battle
+ * occurring.
+ * @see apply
+ */
 export class DoubleBattleChanceAbAttr extends AbAttr {
   constructor() {
     super(false);
   }
 
-  apply(pokemon: Pokemon, passive: boolean, simulated: boolean, cancelled: Utils.BooleanHolder, args: any[]): boolean {
-    const doubleChance = (args[0] as Utils.IntegerHolder);
-    doubleChance.value = Math.max(doubleChance.value / 2, 1);
+  /**
+   * Increases the chance of a double battle occurring
+   * @param args [0] {@linkcode Utils.NumberHolder} for double battle chance
+   * @returns true if the ability was applied
+   */
+  apply(_pokemon: Pokemon, _passive: boolean, _simulated: boolean, _cancelled: Utils.BooleanHolder, args: any[]): boolean {
+    const doubleBattleChance = args[0] as Utils.NumberHolder;
+    // This is divided because the chance is generated as a number from 0 to doubleBattleChance.value using Utils.randSeedInt
+    // A double battle will initiate if the generated number is 0
+    doubleBattleChance.value = doubleBattleChance.value / 4;
+
     return true;
   }
 }
diff --git a/src/modifier/modifier.ts b/src/modifier/modifier.ts
index 4b3d0a85280..63ea212a109 100644
--- a/src/modifier/modifier.ts
+++ b/src/modifier/modifier.ts
@@ -414,7 +414,7 @@ export class DoubleBattleChanceBoosterModifier extends LapsingPersistentModifier
   }
 
   /**
-   * Modifies the chance of a double battle occurring
+   * Increases the chance of a double battle occurring
    * @param args [0] {@linkcode Utils.NumberHolder} for double battle chance
    * @returns true if the modifier was applied
    */
@@ -422,7 +422,7 @@ export class DoubleBattleChanceBoosterModifier extends LapsingPersistentModifier
     const doubleBattleChance = args[0] as Utils.NumberHolder;
     // This is divided because the chance is generated as a number from 0 to doubleBattleChance.value using Utils.randSeedInt
     // A double battle will initiate if the generated number is 0
-    doubleBattleChance.value = Math.ceil(doubleBattleChance.value / 4);
+    doubleBattleChance.value = doubleBattleChance.value / 4;
 
     return true;
   }