September 28, 2020 sunpow Sony PHA-1, PHA-1A Headphone Amplifier Battery SP73 Part Number:CP-SP73 Type: Li-Ion Voltage: 3.7V Capacity: 1200mAh Replace Code: SP73 Compatible with Sony PHA-1, PHA-1A AdvertisementShare this:TweetShare on TumblrWhatsAppTelegramLike this:Like Loading... Related