---
product_id: 51688365
title: "CS 750 mAh 2.77 wh 3.7 V Battery Suitably for Sony NWZ-A801, NW-A805, NW-A805B, NW-A805P, NW-A805W, NW-A806V, NW-A806B, NW-A806W, NW-A806P, NWZ-A810, NW-A815, NW-A816, NWZ-A818, NWZ-A818BLK, NW-A808B, NWZ-A828KBLK, NWZ-A829BLK, NW-S639, NW-S639F"
brand: "supperakku"
price: "NT$10"
currency: TWD
in_stock: true
reviews_count: 1
url: https://www.desertcart.tw/products/51688365-cs-750-mah-2-77-wh-3-7-v-battery
store_origin: TW
region: Taiwan
---

# 3.7 V Li-Polymer tech Compact 51.56x34.58x3.65 mm 750 mAh capacity CS 750 mAh 2.77 wh 3.7 V Battery Suitably for Sony NWZ-A801, NW-A805, NW-A805B, NW-A805P, NW-A805W, NW-A806V, NW-A806B, NW-A806W, NW-A806P, NWZ-A810, NW-A815, NW-A816, NWZ-A818, NWZ-A818BLK, NW-A808B, NWZ-A828KBLK, NWZ-A829BLK, NW-S639, NW-S639F

**Brand:** supperakku
**Price:** NT$10
**Availability:** ✅ In Stock

## Summary

> 🔋 Keep the Beat Alive: Power Your Sony Walkman with Confidence!

## Quick Answers

- **What is this?** CS 750 mAh 2.77 wh 3.7 V Battery Suitably for Sony NWZ-A801, NW-A805, NW-A805B, NW-A805P, NW-A805W, NW-A806V, NW-A806B, NW-A806W, NW-A806P, NWZ-A810, NW-A815, NW-A816, NWZ-A818, NWZ-A818BLK, NW-A808B, NWZ-A828KBLK, NWZ-A829BLK, NW-S639, NW-S639F by supperakku
- **How much does it cost?** NT$10 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.tw](https://www.desertcart.tw/products/51688365-cs-750-mah-2-77-wh-3-7-v-battery)

## Best For

- supperakku enthusiasts

## Why This Product

- Trusted supperakku brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Slim Yet Powerful Design 📏:** Compact dimensions make it a sleek replacement without bulk, preserving your device’s original form factor.
- • **Power Up Your Classic Sony 🎧:** 750 mAh capacity ensures your vintage device stays energized for hours of uninterrupted nostalgia.
- • **Advanced Li-Polymer Battery Tech ⚡:** Reliable 3.7 V output with high-quality cells for consistent performance and longevity.
- • **Precision Fit for Iconic Models 🔄:** Compatible with a wide range of Sony NWZ and NW-A series, keeping your favorite Walkman alive and kicking.
- • **Revive & Relive Your Music Legacy 🔄:** Perfect for professionals who value both retro style and dependable tech—don’t let your classic player fade away.

## Overview

This CS 750 mAh, 3.7 V Li-Polymer battery is a high-quality replacement designed specifically for multiple Sony NWZ and NW-A series MP3 players. With compact dimensions and reliable power output, it revives your classic device’s performance, ensuring extended playtime and preserving your music legacy.

## Description

Technical Data Technology: Li-Polymer Voltage: 3.7 V Capacity: 750 mAh/2.77 wh Dimensions: 51.56 x 34.58 x 3.65 mm Battery compatible To Fit the following models: SonyNWZ-A801, NW-A805, NW-A805BNW-A805P, NW-A805W, NW-A806VNW-A806B, NW-A806W, NW-A806PNWZ-A810, NW-A815, NW-A816NWZ-A818, NWZ-A818BLK, NW-A808BNWZ-A828KBLK, NWZ-A829BLK, NW-S639NW-S639FReplacement for the following battery models: Sony:1-756-702-11, LIS1374HNPA, 7607A12353

Review: Poor fit but it works OK - As others have commented, the battery is slightly too thick, so the case cannot be closed properly (NWZ-S639F). But it works OK so far. As a repair to keep an old Walkman going it seems an acceptable solution.

## Features

- 750 mAh/2.77 wh, 3.7 V, Li-Polymer
- Made from high quality cells
- Suitable for: Sony NWZ-A801, NW-A805, NW-A805B, NW-A805P, NW-A805W, NW-A806V, NW-A806B, NW-A806W, NW-A806P, NWZ-A810, NW-A815, NW-A816, NWZ-A818, NWZ-A818BLK, NW-A808B, NWZ-A828KBLK, NWZ-A829BLK, NW-S639, NW-S639F
- Replaces: Sony 1-756-702-11, LIS1374HNPA, 7607A12353

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B00DT78RDI |
| Customer Reviews | 3.0 3.0 out of 5 stars (1) |
| Date First Available | 25 Jan. 2014 |
| Item model number | CS-SA805SL |
| Other display features | Wireless |

## Product Details

- **Battery capacity:** 750 Milliampere Hour (mAh)
- **Battery cell composition:** Polymer
- **Brand:** Supperakku
- **Recommended uses for product:** Camera
- **Unit count:** 1.0 count

## Images

![CS 750 mAh 2.77 wh 3.7 V Battery Suitably for Sony NWZ-A801, NW-A805, NW-A805B, NW-A805P, NW-A805W, NW-A806V, NW-A806B, NW-A806W, NW-A806P, NWZ-A810, NW-A815, NW-A816, NWZ-A818, NWZ-A818BLK, NW-A808B, NWZ-A828KBLK, NWZ-A829BLK, NW-S639, NW-S639F - Image 1](https://m.media-amazon.com/images/I/61lXpIx+ZKL.jpg)

## Customer Reviews

### ⭐⭐⭐ Poor fit but it works OK
*by J***B on 24 February 2020*

As others have commented, the battery is slightly too thick, so the case cannot be closed properly (NWZ-S639F). But it works OK so far. As a repair to keep an old Walkman going it seems an acceptable solution.

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**Shop now:** [https://www.desertcart.tw/products/51688365-cs-750-mah-2-77-wh-3-7-v-battery](https://www.desertcart.tw/products/51688365-cs-750-mah-2-77-wh-3-7-v-battery)

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*Product available on Desertcart Taiwan*
*Store origin: TW*
*Last updated: 2026-10-12*