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How to replace Technics EAH-AZ70 battery

The procedure of replacing battery for Technics EAH-AZ70 is same as that of Panasonic RZ-S50W

How to replace Technics EAH-AZ70 battery 0?e=1600905600&v=beta&t=0LzVW5mbc9PKlM7WP90HPV8-djOrFMQC4A87onHHA_k

The first step is to cut the earphone off
How to replace Technics EAH-AZ70 battery 0?e=1600905600&v=beta&t=vLXZmG8JhIdV8oFHuB_po1hCYzhyme8pi6tOBlqJ_Kw

Then remove the mainboard of earphone
How to replace Technics EAH-AZ70 battery 0?e=1600905600&v=beta&t=G62zDSEenmA6YcDkk7GySg0GrAEdzu82DNWa0IBDI64

De-soldering the old battery
How to replace Technics EAH-AZ70 battery 0?e=1600905600&v=beta&t=ik9HOAOvDcWMXF_Xmc3qV_tgRaPblRFRa4JTRtjxXX0

Soldering the new battery
How to replace Technics EAH-AZ70 battery 0?e=1600905600&v=beta&t=Gj4g3rdxIaU2pAsBGFC5uxSvSCnRwI2qRDVpaIhjfGg

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How to replace Technics EAH-AZ70 battery 0?e=1600905600&v=beta&t=1Bd7xRBjTq-5ntlrYMMaq3z7ZgPbhdrLnDUmvgyJu8s

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