--- product_id: 679061644 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: "€ 134.24" currency: EUR in_stock: true reviews_count: 5 category: "Exmumcmr" url: https://www.desertcart.gr/products/679061644-2x-pack-z55h-3-85v-70mah-battery-replacement-for-sony store_origin: GR region: Greece --- # 70mAh long-lasting capacity 3.85V high-voltage power Includes precision installation tools 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:** € 134.24 **Availability:** ✅ In Stock ## Summary > 🔋 Power your premium sound, stay unplugged longer! ## 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?** € 134.24 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/679061644-2x-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 - • **Double the Backup:** 2-pack bundle means you’re never caught off guard with dead earbuds again. - • **Power Up Like a Pro:** 3.85V voltage ensures peak performance for your Sony WF-1000XM4 earbuds. - • **Plug & Play Precision:** Comes with specialized tools for a seamless, professional-grade battery swap. - • **Peace of Mind Warranty:** Enjoy 12 months warranty plus 60-day refund and 24/7 support—stress-free upgrade. - • **Endurance That Outlasts:** 70mAh capacity delivers extended listening sessions—beat the original battery life. ## Overview This 2-pack Z55H replacement battery set offers 3.85V and 70mAh capacity, perfectly compatible with Sony WF-1000XM4 earbuds. Each battery is brand new, rechargeable, and includes installation tools for a hassle-free swap. Backed by a 12-month warranty and 24/7 support, it’s the smart upgrade for professionals who demand uninterrupted, industry-leading noise-canceling audio. ## 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: Recomendado - Muy buenas baterías, funcionan muy bien ya un año de uso y almacenan la energía de manera correcta. Review: Perfect replacement so far... - 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 | | Battery Capacity | 750 Milliamp Hours | | Battery Cell Type | Lithium Ion | | Battery Weight | 10 Grams | | Battery capacity | 750 Milliamp Hours | | Battery cell composition | Lithium Ion | | Box Contents | battery | | Brand | EXMUMCMR | | Brand Name | EXMUMCMR | | Compatible Phone Models | WF1000XM4 | | Customer Reviews | 4.4 out of 5 stars 171 Reviews | | Item Dimensions | 12 x 12 millimetres | | Item Weight | 0.04 Kilograms | | Manufacturer | FENGMAI LIMITED | | Model Name | Z55H | | Model Number | Z55H | | Number of Batteries | 1 C batteries required. (included) | | Number of batteries | 1 C batteries required. (included) | | Reusability | Rechargeable | | Unit Count | 2.0 count | | Unit count | 2.0 count | | Voltage | 3.85 Volts | ## Product Details - **Battery capacity:** 750 Milliamp Hours - **Battery cell composition:** Lithium Ion - **Brand:** EXMUMCMR - **Number of batteries:** 1 C batteries required. (included) - **Unit count:** 2.0 count ## 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) ![2X Pack Z55H 3.85V 70mAh Battery Replacement for Sony WF1000XM4 WF-1000XM4 Industry Leading Noise Canceling Truly Wireless Earbud Headphones Battery+ Tools - Image 2](https://m.media-amazon.com/images/I/616nZzYy2+L.jpg) ![2X Pack Z55H 3.85V 70mAh Battery Replacement for Sony WF1000XM4 WF-1000XM4 Industry Leading Noise Canceling Truly Wireless Earbud Headphones Battery+ Tools - Image 3](https://m.media-amazon.com/images/I/61vSUSYvSzL.jpg) ![2X Pack Z55H 3.85V 70mAh Battery Replacement for Sony WF1000XM4 WF-1000XM4 Industry Leading Noise Canceling Truly Wireless Earbud Headphones Battery+ Tools - Image 4](https://m.media-amazon.com/images/I/71XcalcSaNL.jpg) ![2X Pack Z55H 3.85V 70mAh Battery Replacement for Sony WF1000XM4 WF-1000XM4 Industry Leading Noise Canceling Truly Wireless Earbud Headphones Battery+ Tools - Image 5](https://m.media-amazon.com/images/I/61dKogxHoRL.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Recomendado *by J***N on 21 July 2025* Muy buenas baterías, funcionan muy bien ya un año de uso y almacenan la energía de manera correcta. ### ⭐⭐⭐⭐⭐ Perfect replacement so far... *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. ### ⭐⭐⭐⭐⭐ Real oem batteries *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 - EXMUMCMR 2X Pack Z55H 3.85V 75mAh Battery Replacement for Sony WF1000XM4 WF-1000XM4 Industry Leading Noise Canceling Truly Wireless Earbud Headphones Battery+ Tools - iFixit Prying and Opening Tool Assortment - Electronics, Phone, Laptop, Tablet Repair --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.gr/products/679061644-2x-pack-z55h-3-85v-70mah-battery-replacement-for-sony](https://www.desertcart.gr/products/679061644-2x-pack-z55h-3-85v-70mah-battery-replacement-for-sony) --- *Product available on Desertcart Greece* *Store origin: GR* *Last updated: 2026-06-23*