---
product_id: 599981312
title: "2X Pack Z55H 3.85V 70mAh Battery Replacement for Sony WF1000XM4 WF-1000XM4 Industry Leading Noise Canceling Truly Wireless Earbud Headphones Battery+ Tools"
brand: "exmumcmr"
price: "€ 72.00"
currency: EUR
in_stock: true
reviews_count: 5
category: "Exmumcmr"
url: https://www.desertcart.gr/products/599981312-2x-pack-z55h-3-85v-70mah-battery-replacement-for-sony
store_origin: GR
region: Greece
---

# 70mAh Capacity Boost 3.85V Voltage Power Includes Pro Tools Kit 2X Pack Z55H 3.85V 70mAh Battery Replacement for Sony WF1000XM4 WF-1000XM4 Industry Leading Noise Canceling Truly Wireless Earbud Headphones Battery+ Tools

**Brand:** exmumcmr
**Price:** € 72.00
**Availability:** ✅ In Stock

## Summary

> 🔋 Recharge your sound, reclaim your day.

## Quick Answers

- **What is this?** 2X Pack Z55H 3.85V 70mAh Battery Replacement for Sony WF1000XM4 WF-1000XM4 Industry Leading Noise Canceling Truly Wireless Earbud Headphones Battery+ Tools by exmumcmr
- **How much does it cost?** € 72.00 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/599981312-2x-pack-z55h-3-85v-70mah-battery-replacement-for-sony)

## Best For

- exmumcmr enthusiasts

## Why This Product

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

## Key Features

- • **Power Up Like New:** Restore your Sony WF-1000XM4 earbuds to factory-fresh battery life with 3.85V precision voltage.
- • **Risk-Free Upgrade:** Backed by 12-month warranty and 60-day refund—join thousands upgrading their earbuds worry-free.
- • **Long-Lasting Charge:** 70mAh capacity ensures extended playtime, beating original batteries for uninterrupted focus.
- • **Plug & Play Compatibility:** 100% compatible with Sony WF-1000XM4 models—seamless swap without compromise.
- • **Pro-Grade Installation Kit:** Includes specialized tools for a smooth, confident DIY battery replacement experience.

## Overview

This 2-pack Z55H battery replacement kit delivers 3.85V and 70mAh capacity batteries designed exclusively for Sony WF-1000XM4 earbuds. It includes professional-grade tools for easy installation and comes with a 12-month warranty and 60-day refund policy, ensuring a reliable, cost-effective way to restore your earbuds’ original performance and extend their lifespan.

## Description

Specification: Item: Z55H Battery  Voltage: 3.85V Capacity:70mAh  Condition: 100% New from Manufacturer,  Compatible Part Numbers: Z55H CP1254 Compatible with Models: for Sony WF1000XM4 WF-SP900 Bluetooth Headset Includes:2PCSX batteries.+ tools

Review: Las súper recomiendo. Duran más que las originales, por mucho. Es complicado instalarlas, pero eso no es culpa del producto, sino de los audífonos.
Review: Full transparency, I'm only 2 weeks or so into the swapping out of the batteries and I haven't had a chance to use the earbuds heavily since then. I'll update accordingly if things change. Pros: - Price is inexpensive - The kit they send to help with the replacement is a great touch. I saved the kit after I was done and plan on using it for other things in the future. Nice bonus. - About 2-3 weeks in, the batteries seem to be working very well and have restored the right earbud to as it was from the factory. Time will tell how long they hold up, but I'm optimistic. Cons: - None regarding the batteries and kit that were part of this purchase. What to watch out for: - Don't apply too much heat to the earbud you want to disassemble. Turning the earbud in your fingers while applying heat from a heat gun or hair dryer should do the trick. Apply even heat for 10-15 seconds and see if you can pop the housing apart. - I used a paper towel for cushion, applied pressure via a pair of pliers with the paper towel under the teeth of the pliers, and the case started to separate perfectly. Please use very little force when attempting to separate the halves this way as too much pressure could damage the earbud or mar the plastic surface. - When working on the replacement, be careful not to damage any of the ribbon cables inside the earbud. - To separate the circuit board from the top of the battery, I applied heat very briefly, followed by a back-and-forth motion with the included guitar pick looking tool until the circuit board was free from the top of the battery. - Removing the battery can be a bit difficult as it has a type of glue that helps keep it secure. Try to work around the edges of the OEM battery to fee it from this glue. You could also apply heat in short intervals until it loosens as well. - Make sure you drop the new battery into the earbud with the correct polarity facing upwards. - Reassemble in the reverse and you should be good to go. Charge the earbud(s) and test things out. I was a victim of the bad batch of batteries that Sony put into their earlier production of the WF-1000XM4 earbuds. After about 2 years of occasional use, and a firmware update in mid to late 2024, my right earbud would never charge past 95% and when in use, the right earbud battery would maybe last 30 minutes. I was less than pleased after having spent a considerable amount on these earbuds about 2 years or so ago from the time this started happening. I lived with it, opting to use my over the ear headphones for my long flights and didn't think much of it, other than vowing to never give Sony another chance on earbuds, I love their over the ear noise cancelling headphones though. In searching for this issue, I found this battery kit and decided to give it a try. What's the worst that could happen, the right side works 0 minutes versus 30 minutes? I used a YouTube video for the disassembly, removal of OEM battery, installing the new battery, and reassembly. I used a Milwaukee heat gun, and the glue softened quickly but a hairdryer would work as well. Took about 5-10 minutes per earbud, I replaced both so they would both have new batteries, and so far, all is working very well.

## Features

- 100% Compatible with original battery.
- Battery Voltage:3.85V Battery Capacity:70mAh， For battery part number:Z55H CP1254
- Actual measured dimensions (mm): D5.5 x W12
- Compatible for WF-1000XM4 WF1000XM4
- Warranty :Rest assured with 60 days Refund and 12 months Warranty;24 x 7 email support.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0C62L2FTV |
| Antenna Location | WF1000XM4 Headphones |
| Battery Capacity | 750 Milliamp Hours |
| Battery Cell Type | Lithium Ion |
| Battery Weight | 10 Grams |
| Best Sellers Rank | #54,887 in Electronics ( See Top 100 in Electronics ) #2,883 in In-Ear Headphones |
| Brand | EXMUMCMR |
| Built-In Media | Wireless Charging Case |
| Compatible Phone Models | WF-1000XM4 battery Z55H battery |
| Customer Reviews | 4.4 4.4 out of 5 stars (163) |
| Item Dimensions | 12 x 12 millimeters |
| Item Weight | 0.04 Kilograms |
| Manufacturer | FENGMAI LIMITED |
| Model Name | Z55H |
| Model Number | Z55H |
| Number of Batteries | 1 Lithium Ion batteries required. (included) |
| Reusability | Rechargeable |
| Voltage | 3.85 Volts |

## Product Details

- **Battery capacity:** 750 Milliamp Hours
- **Battery cell composition:** Lithium Ion
- **Brand:** EXMUMCMR
- **Number of batteries:** 1 Lithium Ion batteries required. (included)
- **Recommended uses for product:** WF1000XM4 Headphones

## Images

![2X Pack Z55H 3.85V 70mAh Battery Replacement for Sony WF1000XM4 WF-1000XM4 Industry Leading Noise Canceling Truly Wireless Earbud Headphones Battery+ Tools - Image 1](https://m.media-amazon.com/images/I/71ngp8LSsXL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by N***S on 13 January 2026*

Las súper recomiendo. Duran más que las originales, por mucho. Es complicado instalarlas, pero eso no es culpa del producto, sino de los audífonos.

### ⭐⭐⭐⭐⭐ Review
*by F***4 on 15 April 2025*

Full transparency, I'm only 2 weeks or so into the swapping out of the batteries and I haven't had a chance to use the earbuds heavily since then. I'll update accordingly if things change. Pros: - Price is inexpensive - The kit they send to help with the replacement is a great touch. I saved the kit after I was done and plan on using it for other things in the future. Nice bonus. - About 2-3 weeks in, the batteries seem to be working very well and have restored the right earbud to as it was from the factory. Time will tell how long they hold up, but I'm optimistic. Cons: - None regarding the batteries and kit that were part of this purchase. What to watch out for: - Don't apply too much heat to the earbud you want to disassemble. Turning the earbud in your fingers while applying heat from a heat gun or hair dryer should do the trick. Apply even heat for 10-15 seconds and see if you can pop the housing apart. - I used a paper towel for cushion, applied pressure via a pair of pliers with the paper towel under the teeth of the pliers, and the case started to separate perfectly. Please use very little force when attempting to separate the halves this way as too much pressure could damage the earbud or mar the plastic surface. - When working on the replacement, be careful not to damage any of the ribbon cables inside the earbud. - To separate the circuit board from the top of the battery, I applied heat very briefly, followed by a back-and-forth motion with the included guitar pick looking tool until the circuit board was free from the top of the battery. - Removing the battery can be a bit difficult as it has a type of glue that helps keep it secure. Try to work around the edges of the OEM battery to fee it from this glue. You could also apply heat in short intervals until it loosens as well. - Make sure you drop the new battery into the earbud with the correct polarity facing upwards. - Reassemble in the reverse and you should be good to go. Charge the earbud(s) and test things out. I was a victim of the bad batch of batteries that Sony put into their earlier production of the WF-1000XM4 earbuds. After about 2 years of occasional use, and a firmware update in mid to late 2024, my right earbud would never charge past 95% and when in use, the right earbud battery would maybe last 30 minutes. I was less than pleased after having spent a considerable amount on these earbuds about 2 years or so ago from the time this started happening. I lived with it, opting to use my over the ear headphones for my long flights and didn't think much of it, other than vowing to never give Sony another chance on earbuds, I love their over the ear noise cancelling headphones though. In searching for this issue, I found this battery kit and decided to give it a try. What's the worst that could happen, the right side works 0 minutes versus 30 minutes? I used a YouTube video for the disassembly, removal of OEM battery, installing the new battery, and reassembly. I used a Milwaukee heat gun, and the glue softened quickly but a hairdryer would work as well. Took about 5-10 minutes per earbud, I replaced both so they would both have new batteries, and so far, all is working very well.

### ⭐⭐⭐⭐⭐ Review
*by N***B on 12 December 2025*

I got real zenipower batteries (US shipment, mid Dec 2025). They look exactly like the oem ones I took out of the xm4 earbuds. They work well so far. You don't need the tools they send, but the batteries are good and the glue is nice.

## Frequently Bought Together

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-04-23*