How to Replace Battery Sony WF-1000XM4 WF1000XM4 Wireless Earbuds
Do your Sony WF-1000XM4 earbuds drain fast or won’t hold a charge? The battery cell is usually the culprit. This guide walks you through replacing it with a ZeniPower Z55H. It’s an advanced repair, so take your time.
Watch: Sony WF-1000XM4 battery replacement
Ready to order? Grab a pair of Z55H batteries.
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Shop WF-1000XM4 Batteries: $29.99What You’ll Need
- 2 ZeniPower Z55H batteries (one for each earbud)
Tools and supplies (not included):
- Heat gun with a thin nozzle
- Small handheld clamp
- Plastic pry or separator tool
- Small flathead screwdriver
- Tweezers
- B-7000 adhesive
Step-by-Step: How to Replace the Sony WF-1000XM4 Battery
Step 1: Heat the seam
Apply heat evenly around the seam for about a minute to soften the adhesive.
Tip: Keep the heat off the driver. It can damage the earbud.
Step 2: Separate the housings
Use a small handheld clamp on the seam. As you apply pressure it starts to separate. Then break up the adhesive all the way around with your thumbnail, a small flathead or a thin separator tool.
Step 3: Open it carefully
Once the cover is loose, lift it a little. Don’t yank the housings apart, because ribbon connectors hold them together.
Step 4: Separate the two boards
Gently slide a plastic separator tool between the two connected boards and pry up a little until they pop apart. Set that housing aside.
Step 5: Disconnect the battery ribbon
Flip up the small plastic locking tab on the ribbon connector with something very small. Then gently wiggle the ribbon out without forcing it.
Step 6: Remove the old battery
Apply a little heat, then slide the plastic pry tool between the battery and the board until they separate. Pry the battery out and pull any leftover adhesive out with tweezers.
Step 7: Install the new battery
Insert the new Z55H battery negative side up, with the minus sign and printing facing you. It won’t sit perfectly level, and that’s normal.
Step 8: Reattach the board and ribbon
Press the board back onto the battery using the existing adhesive, keeping adhesive off the small connector. Reinsert the ribbon, push the black locking tab down with tweezers, and press the ribbon back onto its adhesive.
Step 9: Reconnect the boards
Line up one side of the boards first, then press until you hear a snap.
Step 10: Glue and clamp
Check that the housings line up, apply B-7000 adhesive along the seam, press them together and clamp. Let it cure, ideally overnight, then scrape and wipe off any excess glue. Repeat for the other earbud.
Bring your WF-1000XM4 battery life back.
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Get WF-1000XM4 Batteries: $29.99Why Do the Sony WF-1000XM4 Batteries Wear Out?
The tiny cells inside each earbud lose capacity with every charge cycle. After enough use they drain quickly or stop holding a charge. That’s normal battery aging, not a defect.
A fresh pair of ZeniPower Z55H cells covers both earbuds in one repair and costs far less than new earbuds.
All Replacement Batteries for the Sony WF-1000XM4
Batteries we carry for the WF-1000XM4:
Case Battery
WF-1000XM4 Charging Case Battery
Replacement battery for the charging case. $24.99
Shop NowFrequently Asked Questions
Is this repair hard?
It’s one of the more advanced repairs we show. It involves heat, glue and small ribbon connectors, so take your time and follow each step.
Are tools included?
No. You need a heat gun, a small clamp, a plastic pry tool, tweezers and B-7000 adhesive.
Which way does the battery go in?
Negative side up, with the minus sign and printing facing you. It won’t sit perfectly flat, and that’s normal.
How long should the glue cure?
Overnight is best, with the earbud clamped.
How many batteries come in a pack?
Two, enough for both earbuds.
DISCOVER · REPAIR · REVIVE
Your WF-1000XM4s aren’t done yet.
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