diff --git a/packages/batch/package.json b/packages/batch/package.json
index 9ec5a21271..8ce33cd6c1 100644
--- a/packages/batch/package.json
+++ b/packages/batch/package.json
@@ -20,8 +20,8 @@
     "build:cjs": "tsc --build tsconfig.json && echo '{ \"type\": \"commonjs\" }' > lib/cjs/package.json",
     "build:esm": "tsc --build tsconfig.esm.json && echo '{ \"type\": \"module\" }' > lib/esm/package.json",
     "build": "npm run build:esm & npm run build:cjs",
-    "lint": "eslint --ext .ts,.js --no-error-on-unmatched-pattern .",
-    "lint-fix": "eslint --fix --ext .ts,.js --no-error-on-unmatched-pattern .",
+    "lint": "biome lint .",
+    "lint:fix": "biome check --write .",
     "prepack": "node ../../.github/scripts/release_patch_package_json.js ."
   },
   "homepage": "https://github.com/aws-powertools/powertools-lambda-typescript/tree/main/packages/batch#readme",
@@ -45,17 +45,12 @@
   },
   "typesVersions": {
     "*": {
-      "types": [
-        "lib/cjs/types.d.ts",
-        "lib/esm/types.d.ts"
-      ]
+      "types": ["lib/cjs/types.d.ts", "lib/esm/types.d.ts"]
     }
   },
   "types": "./lib/cjs/index.d.ts",
   "main": "./lib/cjs/index.js",
-  "files": [
-    "lib"
-  ],
+  "files": ["lib"],
   "repository": {
     "type": "git",
     "url": "git+https://github.com/aws-powertools/powertools-lambda-typescript.git"
diff --git a/packages/batch/src/BasePartialBatchProcessor.ts b/packages/batch/src/BasePartialBatchProcessor.ts
index d89f584c37..7a6c422f57 100644
--- a/packages/batch/src/BasePartialBatchProcessor.ts
+++ b/packages/batch/src/BasePartialBatchProcessor.ts
@@ -147,7 +147,7 @@ abstract class BasePartialBatchProcessor extends BasePartialProcessor {
    * entire batch failed and this method will return `true`.
    */
   public entireBatchFailed(): boolean {
-    return this.errors.length == this.records.length;
+    return this.errors.length === this.records.length;
   }
 
   /**
@@ -167,7 +167,7 @@ abstract class BasePartialBatchProcessor extends BasePartialProcessor {
    * and this method will return `false`.
    */
   public hasMessagesToReport(): boolean {
-    return this.failureMessages.length != 0;
+    return this.failureMessages.length !== 0;
   }
 
   /**
diff --git a/packages/batch/src/SqsFifoPartialProcessor.ts b/packages/batch/src/SqsFifoPartialProcessor.ts
index 26354f3715..6a9546fcb6 100644
--- a/packages/batch/src/SqsFifoPartialProcessor.ts
+++ b/packages/batch/src/SqsFifoPartialProcessor.ts
@@ -1,8 +1,8 @@
-import { SQSRecord } from 'aws-lambda';
+import type { SQSRecord } from 'aws-lambda';
 import { BatchProcessorSync } from './BatchProcessorSync.js';
 import { EventType } from './constants.js';
 import {
-  BatchProcessingError,
+  type BatchProcessingError,
   SqsFifoMessageGroupShortCircuitError,
   SqsFifoShortCircuitError,
 } from './errors.js';
diff --git a/packages/batch/src/constants.ts b/packages/batch/src/constants.ts
index a794ec0ef0..159b12df6a 100644
--- a/packages/batch/src/constants.ts
+++ b/packages/batch/src/constants.ts
@@ -4,8 +4,8 @@ import type {
   SQSRecord,
 } from 'aws-lambda';
 import type {
-  PartialItemFailureResponse,
   EventSourceDataClassTypes,
+  PartialItemFailureResponse,
 } from './types.js';
 
 /**
diff --git a/packages/batch/src/processPartialResponse.ts b/packages/batch/src/processPartialResponse.ts
index 4423e1c179..daba2e862a 100644
--- a/packages/batch/src/processPartialResponse.ts
+++ b/packages/batch/src/processPartialResponse.ts
@@ -1,4 +1,4 @@
-import { BasePartialBatchProcessor } from './BasePartialBatchProcessor.js';
+import type { BasePartialBatchProcessor } from './BasePartialBatchProcessor.js';
 import { UnexpectedBatchTypeError } from './errors.js';
 import type {
   BaseRecord,
diff --git a/packages/batch/src/processPartialResponseSync.ts b/packages/batch/src/processPartialResponseSync.ts
index c8eca684e7..d3216e57fd 100644
--- a/packages/batch/src/processPartialResponseSync.ts
+++ b/packages/batch/src/processPartialResponseSync.ts
@@ -1,4 +1,4 @@
-import { BasePartialBatchProcessor } from './BasePartialBatchProcessor.js';
+import type { BasePartialBatchProcessor } from './BasePartialBatchProcessor.js';
 import { UnexpectedBatchTypeError } from './errors.js';
 import type {
   BaseRecord,
diff --git a/packages/batch/src/types.ts b/packages/batch/src/types.ts
index a267f092b6..7e60704535 100644
--- a/packages/batch/src/types.ts
+++ b/packages/batch/src/types.ts
@@ -4,8 +4,8 @@ import type {
   KinesisStreamRecord,
   SQSRecord,
 } from 'aws-lambda';
-import { SqsFifoPartialProcessor } from './SqsFifoPartialProcessor.js';
-import { BasePartialBatchProcessor } from './BasePartialBatchProcessor.js';
+import type { BasePartialBatchProcessor } from './BasePartialBatchProcessor.js';
+import type { SqsFifoPartialProcessor } from './SqsFifoPartialProcessor.js';
 
 /**
  * Options for batch processing
diff --git a/packages/batch/tests/helpers/factories.ts b/packages/batch/tests/helpers/factories.ts
index ce51736788..bf3b75a7cb 100644
--- a/packages/batch/tests/helpers/factories.ts
+++ b/packages/batch/tests/helpers/factories.ts
@@ -1,9 +1,9 @@
+import { randomInt, randomUUID } from 'node:crypto';
 import type {
   DynamoDBRecord,
   KinesisStreamRecord,
   SQSRecord,
 } from 'aws-lambda';
-import { randomInt, randomUUID } from 'node:crypto';
 
 const sqsRecordFactory = (body: string, messageGroupId?: string): SQSRecord => {
   return {
@@ -41,7 +41,7 @@ const kinesisRecordFactory = (body: string): KinesisStreamRecord => {
     },
     eventSource: 'aws:kinesis',
     eventVersion: '1.0',
-    eventID: 'shardId-000000000006:' + seq,
+    eventID: `shardId-000000000006:${seq}`,
     eventName: 'aws:kinesis:record',
     invokeIdentityArn: 'arn:aws:iam::123456789012:role/lambda-role',
     awsRegion: 'us-east-2',
diff --git a/packages/batch/tests/helpers/handlers.ts b/packages/batch/tests/helpers/handlers.ts
index d8f9a638a0..1902cd1a2b 100644
--- a/packages/batch/tests/helpers/handlers.ts
+++ b/packages/batch/tests/helpers/handlers.ts
@@ -1,8 +1,8 @@
 import type {
+  Context,
   DynamoDBRecord,
   KinesisStreamRecord,
   SQSRecord,
-  Context,
 } from 'aws-lambda';
 
 const sqsRecordHandler = (record: SQSRecord): string => {
@@ -45,7 +45,7 @@ const asyncKinesisRecordHandler = async (
 
 const dynamodbRecordHandler = (record: DynamoDBRecord): object => {
   const body = record.dynamodb?.NewImage?.Message || { S: 'fail' };
-  if (body['S']?.includes('fail')) {
+  if (body.S?.includes('fail')) {
     throw Error('Failed to process record.');
   }
 
@@ -56,7 +56,7 @@ const asyncDynamodbRecordHandler = async (
   record: DynamoDBRecord
 ): Promise<object> => {
   const body = record.dynamodb?.NewImage?.Message || { S: 'fail' };
-  if (body['S']?.includes('fail')) {
+  if (body.S?.includes('fail')) {
     throw Error('Failed to process record.');
   }
 
@@ -65,11 +65,11 @@ const asyncDynamodbRecordHandler = async (
 
 const handlerWithContext = (record: SQSRecord, context: Context): string => {
   try {
-    if (context.getRemainingTimeInMillis() == 0) {
+    if (context.getRemainingTimeInMillis() === 0) {
       throw Error('No time remaining.');
     }
   } catch (e) {
-    throw Error('Context possibly malformed. Displaying context:\n' + context);
+    throw Error(`Context possibly malformed. Displaying context:\n${context}`);
   }
 
   return record.body;
@@ -80,11 +80,11 @@ const asyncHandlerWithContext = async (
   context: Context
 ): Promise<string> => {
   try {
-    if (context.getRemainingTimeInMillis() == 0) {
+    if (context.getRemainingTimeInMillis() === 0) {
       throw Error('No time remaining.');
     }
   } catch (e) {
-    throw Error('Context possibly malformed. Displaying context:\n' + context);
+    throw Error(`Context possibly malformed. Displaying context:\n${context}`);
   }
 
   return Promise.resolve(record.body);
diff --git a/packages/batch/tests/tsconfig.json b/packages/batch/tests/tsconfig.json
index 5654b3e15f..45ba862a85 100644
--- a/packages/batch/tests/tsconfig.json
+++ b/packages/batch/tests/tsconfig.json
@@ -1,11 +1,8 @@
 {
-    "extends": "../tsconfig.json",
-    "compilerOptions": {
-        "rootDir": "../",
-        "noEmit": true
-    },
-    "include": [
-        "../src/**/*",
-        "./**/*",
-    ]
-}
\ No newline at end of file
+  "extends": "../tsconfig.json",
+  "compilerOptions": {
+    "rootDir": "../",
+    "noEmit": true
+  },
+  "include": ["../src/**/*", "./**/*"]
+}
diff --git a/packages/batch/tests/unit/BatchProcessor.test.ts b/packages/batch/tests/unit/BatchProcessor.test.ts
index 1b1114ca86..2160865a05 100644
--- a/packages/batch/tests/unit/BatchProcessor.test.ts
+++ b/packages/batch/tests/unit/BatchProcessor.test.ts
@@ -3,12 +3,12 @@
  *
  * @group unit/batch/class/batchprocessor
  */
-import type { Context } from 'aws-lambda';
 import context from '@aws-lambda-powertools/testing-utils/context';
+import type { Context } from 'aws-lambda';
 import {
+  BatchProcessingError,
   BatchProcessor,
   EventType,
-  BatchProcessingError,
   FullBatchFailureError,
 } from '../../src/index.js';
 import type { BatchProcessingOptions } from '../../src/types.js';
@@ -19,9 +19,9 @@ import {
 } from '../helpers/factories.js';
 import {
   asyncDynamodbRecordHandler,
+  asyncHandlerWithContext,
   asyncKinesisRecordHandler,
   asyncSqsRecordHandler,
-  asyncHandlerWithContext,
 } from '../helpers/handlers.js';
 
 describe('Class: AsyncBatchProcessor', () => {
diff --git a/packages/batch/tests/unit/BatchProcessorSync.test.ts b/packages/batch/tests/unit/BatchProcessorSync.test.ts
index bf93f590a0..07f9257a63 100644
--- a/packages/batch/tests/unit/BatchProcessorSync.test.ts
+++ b/packages/batch/tests/unit/BatchProcessorSync.test.ts
@@ -3,12 +3,12 @@
  *
  * @group unit/batch/class/batchprocessorsync
  */
-import type { Context } from 'aws-lambda';
 import context from '@aws-lambda-powertools/testing-utils/context';
+import type { Context } from 'aws-lambda';
 import {
+  BatchProcessingError,
   BatchProcessorSync,
   EventType,
-  BatchProcessingError,
   FullBatchFailureError,
 } from '../../src/index.js';
 import type { BatchProcessingOptions } from '../../src/types.js';
diff --git a/packages/batch/tests/unit/SqsFifoPartialProcessor.test.ts b/packages/batch/tests/unit/SqsFifoPartialProcessor.test.ts
index 54f463caa8..4ef46e4f70 100644
--- a/packages/batch/tests/unit/SqsFifoPartialProcessor.test.ts
+++ b/packages/batch/tests/unit/SqsFifoPartialProcessor.test.ts
@@ -4,10 +4,10 @@
  * @group unit/batch/class/sqsfifobatchprocessor
  */
 import {
+  SqsFifoMessageGroupShortCircuitError,
   SqsFifoPartialProcessor,
-  processPartialResponseSync,
   SqsFifoShortCircuitError,
-  SqsFifoMessageGroupShortCircuitError,
+  processPartialResponseSync,
 } from '../../src/index.js';
 import { sqsRecordFactory } from '../helpers/factories.js';
 import { sqsRecordHandler } from '../helpers/handlers.js';
@@ -41,7 +41,7 @@ describe('Class: SqsFifoBatchProcessor', () => {
       );
 
       // Assess
-      expect(result['batchItemFailures']).toStrictEqual([]);
+      expect(result.batchItemFailures).toStrictEqual([]);
     });
 
     test('SQS FIFO Batch processor with failures', () => {
@@ -60,11 +60,11 @@ describe('Class: SqsFifoBatchProcessor', () => {
       );
 
       // Assess
-      expect(result['batchItemFailures'].length).toBe(2);
-      expect(result['batchItemFailures'][0]['itemIdentifier']).toBe(
+      expect(result.batchItemFailures.length).toBe(2);
+      expect(result.batchItemFailures[0].itemIdentifier).toBe(
         secondRecord.messageId
       );
-      expect(result['batchItemFailures'][1]['itemIdentifier']).toBe(
+      expect(result.batchItemFailures[1].itemIdentifier).toBe(
         thirdRecord.messageId
       );
       expect(processor.errors[1]).toBeInstanceOf(SqsFifoShortCircuitError);
@@ -99,17 +99,17 @@ describe('Class: SqsFifoBatchProcessor', () => {
       );
 
       // Assess
-      expect(result['batchItemFailures'].length).toBe(4);
-      expect(result['batchItemFailures'][0]['itemIdentifier']).toBe(
+      expect(result.batchItemFailures.length).toBe(4);
+      expect(result.batchItemFailures[0].itemIdentifier).toBe(
         firstRecord.messageId
       );
-      expect(result['batchItemFailures'][1]['itemIdentifier']).toBe(
+      expect(result.batchItemFailures[1].itemIdentifier).toBe(
         secondRecord.messageId
       );
-      expect(result['batchItemFailures'][2]['itemIdentifier']).toBe(
+      expect(result.batchItemFailures[2].itemIdentifier).toBe(
         thirdRecord.messageId
       );
-      expect(result['batchItemFailures'][3]['itemIdentifier']).toBe(
+      expect(result.batchItemFailures[3].itemIdentifier).toBe(
         fourthRecord.messageId
       );
       expect(processor.errors.length).toBe(4);
@@ -150,11 +150,11 @@ describe('Class: SqsFifoBatchProcessor', () => {
       );
 
       // Assess
-      expect(result['batchItemFailures'].length).toBe(2);
-      expect(result['batchItemFailures'][0]['itemIdentifier']).toBe(
+      expect(result.batchItemFailures.length).toBe(2);
+      expect(result.batchItemFailures[0].itemIdentifier).toBe(
         thirdRecord.messageId
       );
-      expect(result['batchItemFailures'][1]['itemIdentifier']).toBe(
+      expect(result.batchItemFailures[1].itemIdentifier).toBe(
         fourthRecord.messageId
       );
       expect(processor.errors.length).toBe(2);
@@ -185,7 +185,7 @@ describe('Class: SqsFifoBatchProcessor', () => {
       );
 
       // Assess
-      expect(result['batchItemFailures'].length).toBe(0);
+      expect(result.batchItemFailures.length).toBe(0);
       expect(processor.errors.length).toBe(0);
     });
 
@@ -211,7 +211,7 @@ describe('Class: SqsFifoBatchProcessor', () => {
       );
 
       // Assess
-      expect(result['batchItemFailures'].length).toBe(0);
+      expect(result.batchItemFailures.length).toBe(0);
       expect(processor.errors.length).toBe(0);
     });
 
@@ -237,14 +237,14 @@ describe('Class: SqsFifoBatchProcessor', () => {
       );
 
       // Assess
-      expect(result['batchItemFailures'].length).toBe(3);
-      expect(result['batchItemFailures'][0]['itemIdentifier']).toBe(
+      expect(result.batchItemFailures.length).toBe(3);
+      expect(result.batchItemFailures[0].itemIdentifier).toBe(
         secondRecord.messageId
       );
-      expect(result['batchItemFailures'][1]['itemIdentifier']).toBe(
+      expect(result.batchItemFailures[1].itemIdentifier).toBe(
         thirdRecord.messageId
       );
-      expect(result['batchItemFailures'][2]['itemIdentifier']).toBe(
+      expect(result.batchItemFailures[2].itemIdentifier).toBe(
         fourthRecord.messageId
       );
       expect(processor.errors.length).toBe(3);
diff --git a/packages/batch/tests/unit/processPartialResponse.test.ts b/packages/batch/tests/unit/processPartialResponse.test.ts
index 1d379e6398..2ebd22d5ec 100644
--- a/packages/batch/tests/unit/processPartialResponse.test.ts
+++ b/packages/batch/tests/unit/processPartialResponse.test.ts
@@ -3,19 +3,20 @@
  *
  * @group unit/batch/function/asyncProcesspartialresponse
  */
+import assert from 'node:assert';
+import context from '@aws-lambda-powertools/testing-utils/context';
 import type {
   Context,
   DynamoDBStreamEvent,
   KinesisStreamEvent,
   SQSEvent,
 } from 'aws-lambda';
-import context from '@aws-lambda-powertools/testing-utils/context';
 import {
   BatchProcessor,
-  processPartialResponse,
   EventType,
-  UnexpectedBatchTypeError,
   FullBatchFailureError,
+  UnexpectedBatchTypeError,
+  processPartialResponse,
 } from '../../src/index.js';
 import type {
   BatchProcessingOptions,
@@ -32,7 +33,6 @@ import {
   asyncKinesisRecordHandler,
   asyncSqsRecordHandler,
 } from '../helpers/handlers.js';
-import assert from 'node:assert';
 
 describe('Function: processPartialResponse()', () => {
   const ENVIRONMENT_VARIABLES = process.env;
diff --git a/packages/batch/tests/unit/processPartialResponseSync.test.ts b/packages/batch/tests/unit/processPartialResponseSync.test.ts
index 8d4bb1e263..56519ec63b 100644
--- a/packages/batch/tests/unit/processPartialResponseSync.test.ts
+++ b/packages/batch/tests/unit/processPartialResponseSync.test.ts
@@ -3,19 +3,20 @@
  *
  * @group unit/batch/function/processpartialresponse
  */
+import assert from 'node:assert';
+import context from '@aws-lambda-powertools/testing-utils/context';
 import type {
   Context,
   DynamoDBStreamEvent,
   KinesisStreamEvent,
   SQSEvent,
 } from 'aws-lambda';
-import context from '@aws-lambda-powertools/testing-utils/context';
 import {
   BatchProcessorSync,
-  processPartialResponseSync,
   EventType,
-  UnexpectedBatchTypeError,
   FullBatchFailureError,
+  UnexpectedBatchTypeError,
+  processPartialResponseSync,
 } from '../../src/index.js';
 import type {
   BatchProcessingOptions,
@@ -32,7 +33,6 @@ import {
   kinesisRecordHandler,
   sqsRecordHandler,
 } from '../helpers/handlers.js';
-import assert from 'node:assert';
 
 describe('Function: processPartialResponse()', () => {
   const ENVIRONMENT_VARIABLES = process.env;
diff --git a/packages/batch/tsconfig.esm.json b/packages/batch/tsconfig.esm.json
index 123291b0cf..82486b64fa 100644
--- a/packages/batch/tsconfig.esm.json
+++ b/packages/batch/tsconfig.esm.json
@@ -6,7 +6,5 @@
     "rootDir": "./src",
     "tsBuildInfoFile": ".tsbuildinfo/esm.json"
   },
-  "include": [
-    "./src/**/*"
-  ]
-}
\ No newline at end of file
+  "include": ["./src/**/*"]
+}
diff --git a/packages/batch/tsconfig.json b/packages/batch/tsconfig.json
index 4836a14962..4923c4f6f4 100644
--- a/packages/batch/tsconfig.json
+++ b/packages/batch/tsconfig.json
@@ -1,11 +1,9 @@
 {
-    "extends": "../../tsconfig.json",
-    "compilerOptions": {
-        "outDir": "./lib/cjs/",
-        "rootDir": "./src",
-        "tsBuildInfoFile": ".tsbuildinfo/cjs.json"
-    },
-    "include": [
-        "./src/**/*"
-    ],
-}
\ No newline at end of file
+  "extends": "../../tsconfig.json",
+  "compilerOptions": {
+    "outDir": "./lib/cjs/",
+    "rootDir": "./src",
+    "tsBuildInfoFile": ".tsbuildinfo/cjs.json"
+  },
+  "include": ["./src/**/*"]
+}
diff --git a/packages/batch/typedoc.json b/packages/batch/typedoc.json
index 7b5f0117b6..2cc575bc18 100644
--- a/packages/batch/typedoc.json
+++ b/packages/batch/typedoc.json
@@ -1,10 +1,5 @@
 {
-  "extends": [
-    "../../typedoc.base.json"
-  ],
-  "entryPoints": [
-    "./src/index.ts",
-    "./src/types.ts"
-  ],
+  "extends": ["../../typedoc.base.json"],
+  "entryPoints": ["./src/index.ts", "./src/types.ts"],
   "readme": "README.md"
-}
\ No newline at end of file
+}