This is the original battery found inside your Sony WF-1000XM3 and WF-1000XM4 earbuds. You can buy from us knowing we do test each battery before we ship the parts. Make sure you know you have a battery issue before you order this part so that this fixes the issue you are having.

• Brand: ZeniPower For Sony
• Fits Model: WF-1000XM3 & WF-1000XM4 
• Battery Type: Coin
• Battery Model: Z55H
• Specifications: 3.85V, 0.29Wh, 75mAh
• Condition: New

Options: 2 x Batteries + Repair Kit

Included: 

• 2 x New ZeniPower Z55H Coin Batteries
• 1 x Nylon Spudger 
• 1 x Pry Tool 
• 1 x 10mL RTV Glue 

Options: 2 x Batteries

Included: 

• 2 x New ZeniPower Z55H Coin Batteries