diff --git a/packages/batch/jest.config.js b/packages/batch/jest.config.cjs
similarity index 93%
rename from packages/batch/jest.config.js
rename to packages/batch/jest.config.cjs
index 3db7c7a6da..9eaa88fbf4 100644
--- a/packages/batch/jest.config.js
+++ b/packages/batch/jest.config.cjs
@@ -5,6 +5,9 @@ module.exports = {
   },
   runner: 'groups',
   preset: 'ts-jest',
+  moduleNameMapper: {
+    '^(\\.{1,2}/.*)\\.js$': '$1',
+  },
   transform: {
     '^.+\\.ts?$': 'ts-jest',
   },
diff --git a/packages/batch/package.json b/packages/batch/package.json
index 5876184a0f..18165c1f9b 100644
--- a/packages/batch/package.json
+++ b/packages/batch/package.json
@@ -19,19 +19,46 @@
     "test:e2e:nodejs20x": "echo 'Not Implemented'",
     "test:e2e": "echo 'Not Implemented'",
     "watch": "jest --watch",
-    "build": "tsc --build --force",
+    "build:cjs": "tsc --build --force && echo '{ \"type\": \"commonjs\" }' > lib/cjs/package.json",
+    "build:esm": "tsc --project 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 .",
     "prebuild": "rimraf ./lib",
-    "prepack": "node ../../.github/scripts/release_patch_package_json.js ."
+    "prepack": "rimraf ./lib/*.tsbuildinfo && node ../../.github/scripts/release_patch_package_json.js ."
   },
   "lint-staged": {
     "*.{js,ts}": "npm run lint-fix"
   },
   "homepage": "https://github.com/aws-powertools/powertools-lambda-typescript/tree/main/packages/batch#readme",
   "license": "MIT-0",
-  "main": "./lib/index.js",
-  "types": "./lib/index.d.ts",
+  "type": "module",
+  "exports": {
+    ".": {
+      "require": {
+        "types": "./lib/cjs/index.d.ts",
+        "default": "./lib/cjs/index.js"
+      },
+      "import": {
+        "types": "./lib/esm/index.d.ts",
+        "default": "./lib/esm/index.js"
+      }
+    },
+    "./types": {
+      "import": "./lib/esm/types.js",
+      "require": "./lib/cjs/types.js"
+    }
+  },
+  "typesVersions": {
+    "*": {
+      "types": [
+        "lib/cjs/types.d.ts",
+        "lib/esm/types.d.ts"
+      ]
+    }
+  },
+  "types": "./lib/cjs/index.d.ts",
+  "main": "./lib/cjs/index.js",
   "files": [
     "lib"
   ],
diff --git a/packages/batch/src/BasePartialBatchProcessor.ts b/packages/batch/src/BasePartialBatchProcessor.ts
index 3cf4b30309..10b04b3e4e 100644
--- a/packages/batch/src/BasePartialBatchProcessor.ts
+++ b/packages/batch/src/BasePartialBatchProcessor.ts
@@ -3,14 +3,18 @@ import type {
   KinesisStreamRecord,
   SQSRecord,
 } from 'aws-lambda';
-import { BasePartialProcessor } from './BasePartialProcessor';
-import { DATA_CLASS_MAPPING, DEFAULT_RESPONSE, EventType } from './constants';
-import { FullBatchFailureError } from './errors';
+import { BasePartialProcessor } from './BasePartialProcessor.js';
+import {
+  DATA_CLASS_MAPPING,
+  DEFAULT_RESPONSE,
+  EventType,
+} from './constants.js';
+import { FullBatchFailureError } from './errors.js';
 import type {
   EventSourceDataClassTypes,
   PartialItemFailureResponse,
   PartialItemFailures,
-} from './types';
+} from './types.js';
 
 /**
  * Process batch and partially report failed items
diff --git a/packages/batch/src/BasePartialProcessor.ts b/packages/batch/src/BasePartialProcessor.ts
index 9de6901394..f4ec911446 100644
--- a/packages/batch/src/BasePartialProcessor.ts
+++ b/packages/batch/src/BasePartialProcessor.ts
@@ -5,7 +5,7 @@ import type {
   FailureResponse,
   ResultType,
   SuccessResponse,
-} from './types';
+} from './types.js';
 
 /**
  * Abstract class for batch processors.
diff --git a/packages/batch/src/BatchProcessor.ts b/packages/batch/src/BatchProcessor.ts
index bbe9856f07..960bcd4dde 100644
--- a/packages/batch/src/BatchProcessor.ts
+++ b/packages/batch/src/BatchProcessor.ts
@@ -1,6 +1,6 @@
-import { BasePartialBatchProcessor } from './BasePartialBatchProcessor';
-import { BatchProcessingError } from './errors';
-import type { BaseRecord, FailureResponse, SuccessResponse } from './types';
+import { BasePartialBatchProcessor } from './BasePartialBatchProcessor.js';
+import { BatchProcessingError } from './errors.js';
+import type { BaseRecord, FailureResponse, SuccessResponse } from './types.js';
 
 /**
  * Process native partial responses from SQS, Kinesis Data Streams, and DynamoDB
diff --git a/packages/batch/src/BatchProcessorSync.ts b/packages/batch/src/BatchProcessorSync.ts
index 5bb8ce1f12..87a1566f4c 100644
--- a/packages/batch/src/BatchProcessorSync.ts
+++ b/packages/batch/src/BatchProcessorSync.ts
@@ -1,6 +1,6 @@
-import { BasePartialBatchProcessor } from './BasePartialBatchProcessor';
-import { BatchProcessingError } from './errors';
-import type { BaseRecord, FailureResponse, SuccessResponse } from './types';
+import { BasePartialBatchProcessor } from './BasePartialBatchProcessor.js';
+import { BatchProcessingError } from './errors.js';
+import type { BaseRecord, FailureResponse, SuccessResponse } from './types.js';
 
 /**
  * Process native partial responses from SQS, Kinesis Data Streams, and DynamoDB
diff --git a/packages/batch/src/SqsFifoPartialProcessor.ts b/packages/batch/src/SqsFifoPartialProcessor.ts
index 2aca4ed814..3189c00fd5 100644
--- a/packages/batch/src/SqsFifoPartialProcessor.ts
+++ b/packages/batch/src/SqsFifoPartialProcessor.ts
@@ -1,7 +1,7 @@
-import { BatchProcessorSync } from './BatchProcessorSync';
-import { EventType } from './constants';
-import { SqsFifoShortCircuitError } from './errors';
-import type { FailureResponse, SuccessResponse } from './types';
+import { BatchProcessorSync } from './BatchProcessorSync.js';
+import { EventType } from './constants.js';
+import { SqsFifoShortCircuitError } from './errors.js';
+import type { FailureResponse, SuccessResponse } from './types.js';
 
 /**
  * Process native partial responses from SQS FIFO queues
diff --git a/packages/batch/src/constants.ts b/packages/batch/src/constants.ts
index d06d5a8872..5f55e1e347 100644
--- a/packages/batch/src/constants.ts
+++ b/packages/batch/src/constants.ts
@@ -6,7 +6,7 @@ import type {
 import type {
   PartialItemFailureResponse,
   EventSourceDataClassTypes,
-} from './types';
+} from './types.js';
 
 const EventType = {
   SQS: 'SQS',
diff --git a/packages/batch/src/errors.ts b/packages/batch/src/errors.ts
index 8d2b0327b0..4ce6b27de9 100644
--- a/packages/batch/src/errors.ts
+++ b/packages/batch/src/errors.ts
@@ -1,4 +1,4 @@
-import { EventType } from './constants';
+import { EventType } from './constants.js';
 
 /**
  * Base error thrown by the Batch Processing utility
diff --git a/packages/batch/src/index.ts b/packages/batch/src/index.ts
index b1b1069b26..6613712b7e 100644
--- a/packages/batch/src/index.ts
+++ b/packages/batch/src/index.ts
@@ -1,10 +1,13 @@
-export * from './constants';
-export * from './errors';
-export * from './types';
-export * from './BasePartialProcessor';
-export * from './BasePartialBatchProcessor';
-export * from './BatchProcessorSync';
-export * from './BatchProcessor';
-export * from './processPartialResponseSync';
-export * from './processPartialResponse';
-export * from './SqsFifoPartialProcessor';
+export { EventType } from './constants.js';
+export {
+  BatchProcessingError,
+  FullBatchFailureError,
+  SqsFifoShortCircuitError,
+  UnexpectedBatchTypeError,
+} from './errors.js';
+export { BasePartialBatchProcessor } from './BasePartialBatchProcessor.js';
+export { BatchProcessorSync } from './BatchProcessorSync.js';
+export { BatchProcessor } from './BatchProcessor.js';
+export { processPartialResponseSync } from './processPartialResponseSync.js';
+export { processPartialResponse } from './processPartialResponse.js';
+export { SqsFifoPartialProcessor } from './SqsFifoPartialProcessor.js';
diff --git a/packages/batch/src/processPartialResponse.ts b/packages/batch/src/processPartialResponse.ts
index 947b4268b6..8c5d7d79c9 100644
--- a/packages/batch/src/processPartialResponse.ts
+++ b/packages/batch/src/processPartialResponse.ts
@@ -1,10 +1,10 @@
-import { BasePartialBatchProcessor } from './BasePartialBatchProcessor';
-import { UnexpectedBatchTypeError } from './errors';
+import { BasePartialBatchProcessor } from './BasePartialBatchProcessor.js';
+import { UnexpectedBatchTypeError } from './errors.js';
 import type {
   BaseRecord,
   BatchProcessingOptions,
   PartialItemFailureResponse,
-} from './types';
+} from './types.js';
 
 /**
  * Higher level function to handle batch event processing
diff --git a/packages/batch/src/processPartialResponseSync.ts b/packages/batch/src/processPartialResponseSync.ts
index 474713e7d5..7fb7056385 100644
--- a/packages/batch/src/processPartialResponseSync.ts
+++ b/packages/batch/src/processPartialResponseSync.ts
@@ -1,10 +1,10 @@
-import { BasePartialBatchProcessor } from './BasePartialBatchProcessor';
-import { UnexpectedBatchTypeError } from './errors';
+import { BasePartialBatchProcessor } from './BasePartialBatchProcessor.js';
+import { UnexpectedBatchTypeError } from './errors.js';
 import type {
   BaseRecord,
   BatchProcessingOptions,
   PartialItemFailureResponse,
-} from './types';
+} from './types.js';
 
 /**
  * Higher level function to handle batch event processing
diff --git a/packages/batch/tests/helpers/handlers.ts b/packages/batch/tests/helpers/handlers.ts
index 0256129f9b..d8f9a638a0 100644
--- a/packages/batch/tests/helpers/handlers.ts
+++ b/packages/batch/tests/helpers/handlers.ts
@@ -2,8 +2,8 @@ import type {
   DynamoDBRecord,
   KinesisStreamRecord,
   SQSRecord,
+  Context,
 } from 'aws-lambda';
-import type { Context } from 'aws-lambda';
 
 const sqsRecordHandler = (record: SQSRecord): string => {
   const body = record.body;
diff --git a/packages/batch/tests/unit/BasePartialProcessor.test.ts b/packages/batch/tests/unit/BasePartialProcessor.test.ts
new file mode 100644
index 0000000000..aa3bdb3d4b
--- /dev/null
+++ b/packages/batch/tests/unit/BasePartialProcessor.test.ts
@@ -0,0 +1,74 @@
+/**
+ * Test BasePartialBatchProcessor class
+ *
+ * @group unit/batch/class/basepartialbatchprocessor
+ */
+import { BasePartialBatchProcessor, EventType } from '../../src/index.js';
+import type {
+  BaseRecord,
+  FailureResponse,
+  SuccessResponse,
+} from '../../src/types.js';
+import { sqsRecordFactory } from '../helpers/factories.js';
+import { sqsRecordHandler } from '../helpers/handlers.js';
+
+describe('Class: BasePartialBatchProcessor', () => {
+  const ENVIRONMENT_VARIABLES = process.env;
+
+  beforeEach(() => {
+    jest.clearAllMocks();
+    jest.resetModules();
+    process.env = { ...ENVIRONMENT_VARIABLES };
+  });
+
+  afterAll(() => {
+    process.env = ENVIRONMENT_VARIABLES;
+  });
+
+  class MyPartialProcessor extends BasePartialBatchProcessor {
+    public constructor() {
+      super(EventType.SQS);
+    }
+
+    public async processRecord(
+      _record: BaseRecord
+    ): Promise<SuccessResponse | FailureResponse> {
+      throw new Error('Not implemented');
+    }
+
+    public processRecordSync(
+      record: BaseRecord
+    ): SuccessResponse | FailureResponse {
+      console.log('Processing record');
+
+      return this.successHandler(record, 'success');
+    }
+  }
+
+  describe('create custom batch partial processor', () => {
+    it('should create a custom batch partial processor', () => {
+      // Act
+      const processor = new MyPartialProcessor();
+
+      // Assess
+      expect(processor).toBeInstanceOf(BasePartialBatchProcessor);
+    });
+
+    it('should process a batch of records', () => {
+      // Prepare
+      const processor = new MyPartialProcessor();
+      const records = [sqsRecordFactory('success')];
+      const consoleSpy = jest.spyOn(console, 'log');
+
+      // Act
+      processor.register(records, sqsRecordHandler);
+      const processedMessages = processor.processSync();
+
+      // Assess
+      expect(processedMessages).toStrictEqual([
+        ['success', records[0].body, records[0]],
+      ]);
+      expect(consoleSpy).toHaveBeenCalledTimes(1);
+    });
+  });
+});
diff --git a/packages/batch/tests/unit/BatchProcessor.test.ts b/packages/batch/tests/unit/BatchProcessor.test.ts
index 3243c1a4a0..4588e62099 100644
--- a/packages/batch/tests/unit/BatchProcessor.test.ts
+++ b/packages/batch/tests/unit/BatchProcessor.test.ts
@@ -1,25 +1,28 @@
 /**
- * Test AsyncBatchProcessor class
+ * Test BatchProcessor class
  *
- * @group unit/batch/class/asyncBatchProcessor
+ * @group unit/batch/class/batchprocessor
  */
 import type { Context } from 'aws-lambda';
 import { ContextExamples as dummyContext } from '@aws-lambda-powertools/commons';
-import { BatchProcessor } from '../../src/BatchProcessor';
-import { EventType } from '../../src/constants';
-import { BatchProcessingError, FullBatchFailureError } from '../../src/errors';
-import type { BatchProcessingOptions } from '../../src/types';
+import {
+  BatchProcessor,
+  EventType,
+  BatchProcessingError,
+  FullBatchFailureError,
+} from '../../src/index.js';
+import type { BatchProcessingOptions } from '../../src/types.js';
 import {
   dynamodbRecordFactory,
   kinesisRecordFactory,
   sqsRecordFactory,
-} from '../helpers/factories';
+} from '../helpers/factories.js';
 import {
   asyncDynamodbRecordHandler,
   asyncKinesisRecordHandler,
   asyncSqsRecordHandler,
   asyncHandlerWithContext,
-} from '../helpers/handlers';
+} from '../helpers/handlers.js';
 
 describe('Class: AsyncBatchProcessor', () => {
   const ENVIRONMENT_VARIABLES = process.env;
diff --git a/packages/batch/tests/unit/BatchProcessorSync.test.ts b/packages/batch/tests/unit/BatchProcessorSync.test.ts
index 506e192d02..31a5315431 100644
--- a/packages/batch/tests/unit/BatchProcessorSync.test.ts
+++ b/packages/batch/tests/unit/BatchProcessorSync.test.ts
@@ -1,25 +1,28 @@
 /**
- * Test BatchProcessor class
+ * Test BatchProcessorSync class
  *
- * @group unit/batch/class/batchprocessor
+ * @group unit/batch/class/batchprocessorsync
  */
 import type { Context } from 'aws-lambda';
 import { ContextExamples as dummyContext } from '@aws-lambda-powertools/commons';
-import { BatchProcessorSync } from '../../src/BatchProcessorSync';
-import { EventType } from '../../src/constants';
-import { BatchProcessingError, FullBatchFailureError } from '../../src/errors';
-import type { BatchProcessingOptions } from '../../src/types';
+import {
+  BatchProcessorSync,
+  EventType,
+  BatchProcessingError,
+  FullBatchFailureError,
+} from '../../src/index.js';
+import type { BatchProcessingOptions } from '../../src/types.js';
 import {
   dynamodbRecordFactory,
   kinesisRecordFactory,
   sqsRecordFactory,
-} from '../helpers/factories';
+} from '../helpers/factories.js';
 import {
   dynamodbRecordHandler,
   handlerWithContext,
   kinesisRecordHandler,
   sqsRecordHandler,
-} from '../helpers/handlers';
+} from '../helpers/handlers.js';
 
 describe('Class: BatchProcessor', () => {
   const ENVIRONMENT_VARIABLES = process.env;
diff --git a/packages/batch/tests/unit/SqsFifoPartialProcessor.test.ts b/packages/batch/tests/unit/SqsFifoPartialProcessor.test.ts
index 5c7f6c5796..61d12183fc 100644
--- a/packages/batch/tests/unit/SqsFifoPartialProcessor.test.ts
+++ b/packages/batch/tests/unit/SqsFifoPartialProcessor.test.ts
@@ -7,9 +7,9 @@ import {
   SqsFifoPartialProcessor,
   processPartialResponseSync,
   SqsFifoShortCircuitError,
-} from '../../src';
-import { sqsRecordFactory } from '../helpers/factories';
-import { sqsRecordHandler } from '../helpers/handlers';
+} from '../../src/index.js';
+import { sqsRecordFactory } from '../helpers/factories.js';
+import { sqsRecordHandler } from '../helpers/handlers.js';
 
 describe('Class: SqsFifoBatchProcessor', () => {
   const ENVIRONMENT_VARIABLES = process.env;
diff --git a/packages/batch/tests/unit/processPartialResponse.test.ts b/packages/batch/tests/unit/processPartialResponse.test.ts
index d344eb7883..66d97177a5 100644
--- a/packages/batch/tests/unit/processPartialResponse.test.ts
+++ b/packages/batch/tests/unit/processPartialResponse.test.ts
@@ -13,24 +13,28 @@ import {
   ContextExamples as dummyContext,
   Events as dummyEvent,
 } from '@aws-lambda-powertools/commons';
-import { BatchProcessor } from '../../src/BatchProcessor';
-import { processPartialResponse } from '../../src/processPartialResponse';
-import { EventType } from '../../src/constants';
+import {
+  BatchProcessor,
+  processPartialResponse,
+  EventType,
+  UnexpectedBatchTypeError,
+} from '../../src/index.js';
 import type {
   BatchProcessingOptions,
   PartialItemFailureResponse,
-} from '../../src/types';
+} from '../../src/types.js';
 import {
   dynamodbRecordFactory,
   kinesisRecordFactory,
   sqsRecordFactory,
-} from '../helpers/factories';
+} from '../helpers/factories.js';
 import {
   asyncDynamodbRecordHandler,
   asyncHandlerWithContext,
   asyncKinesisRecordHandler,
   asyncSqsRecordHandler,
-} from '../helpers/handlers';
+} from '../helpers/handlers.js';
+import assert from 'node:assert';
 
 describe('Function: processPartialResponse()', () => {
   const ENVIRONMENT_VARIABLES = process.env;
@@ -186,14 +190,18 @@ describe('Function: processPartialResponse()', () => {
         );
       };
 
-      // Act & Assess
-      await expect(() =>
-        handler(event as unknown as SQSEvent, context.helloworldContext)
-      ).rejects.toThrowError(
-        `Unexpected batch type. Possible values are: ${Object.keys(
-          EventType
-        ).join(', ')}`
-      );
+      try {
+        // Act
+        await handler(event as unknown as SQSEvent, context.helloworldContext);
+      } catch (error) {
+        // Assess
+        assert(error instanceof UnexpectedBatchTypeError);
+        expect(error.message).toBe(
+          `Unexpected batch type. Possible values are: ${Object.keys(
+            EventType
+          ).join(', ')}`
+        );
+      }
     });
 
     test('Process partial response through handler with context provided', async () => {
diff --git a/packages/batch/tests/unit/processPartialResponseSync.test.ts b/packages/batch/tests/unit/processPartialResponseSync.test.ts
index 426428f5d4..e6700d8959 100644
--- a/packages/batch/tests/unit/processPartialResponseSync.test.ts
+++ b/packages/batch/tests/unit/processPartialResponseSync.test.ts
@@ -13,24 +13,28 @@ import {
   ContextExamples as dummyContext,
   Events as dummyEvent,
 } from '@aws-lambda-powertools/commons';
-import { BatchProcessorSync } from '../../src/BatchProcessorSync';
-import { processPartialResponseSync } from '../../src/processPartialResponseSync';
-import { EventType } from '../../src/constants';
+import {
+  BatchProcessorSync,
+  processPartialResponseSync,
+  EventType,
+  UnexpectedBatchTypeError,
+} from '../../src/index.js';
 import type {
   BatchProcessingOptions,
   PartialItemFailureResponse,
-} from '../../src/types';
+} from '../../src/types.js';
 import {
   dynamodbRecordFactory,
   kinesisRecordFactory,
   sqsRecordFactory,
-} from '../helpers/factories';
+} from '../helpers/factories.js';
 import {
   dynamodbRecordHandler,
   handlerWithContext,
   kinesisRecordHandler,
   sqsRecordHandler,
-} from '../helpers/handlers';
+} from '../helpers/handlers.js';
+import assert from 'node:assert';
 
 describe('Function: processPartialResponse()', () => {
   const ENVIRONMENT_VARIABLES = process.env;
@@ -182,14 +186,18 @@ describe('Function: processPartialResponse()', () => {
         return processPartialResponseSync(event, sqsRecordHandler, processor);
       };
 
-      // Act & Assess
-      expect(() =>
-        handler(event as unknown as SQSEvent, context.helloworldContext)
-      ).toThrowError(
-        `Unexpected batch type. Possible values are: ${Object.keys(
-          EventType
-        ).join(', ')}`
-      );
+      try {
+        // Act
+        handler(event as unknown as SQSEvent, context.helloworldContext);
+      } catch (error) {
+        // Assess
+        assert(error instanceof UnexpectedBatchTypeError);
+        expect(error.message).toBe(
+          `Unexpected batch type. Possible values are: ${Object.keys(
+            EventType
+          ).join(', ')}`
+        );
+      }
     });
 
     test('Process partial response through handler with context provided', () => {
diff --git a/packages/batch/tsconfig.esm.json b/packages/batch/tsconfig.esm.json
new file mode 100644
index 0000000000..9bed8e4da4
--- /dev/null
+++ b/packages/batch/tsconfig.esm.json
@@ -0,0 +1,11 @@
+{
+  "extends": "../../tsconfig.esm.json",
+  "compilerOptions": {
+    "baseUrl": ".",
+    "outDir": "./lib/esm",
+    "rootDir": "./src"
+  },
+  "include": [
+    "./src/**/*"
+  ]
+}
\ No newline at end of file
diff --git a/packages/batch/tsconfig.json b/packages/batch/tsconfig.json
index 1cb9d72773..5be842b9f8 100644
--- a/packages/batch/tsconfig.json
+++ b/packages/batch/tsconfig.json
@@ -1,7 +1,7 @@
 {
     "extends": "../../tsconfig.json",
     "compilerOptions": {
-        "outDir": "./lib",
+        "outDir": "./lib/cjs/",
         "rootDir": "./src",
     },
     "include": [