September 2, 2020 sunpow Koss BT540i Headset Battery Part Number:CP-KS540I Type: Li-Polymer Voltage: 3.7V Capacity: 295mAh Compatible with Koss KPH7 Wireless,Koss BT540i AdvertisementShare this:TweetShare on TumblrWhatsAppTelegramLike this:Like Loading... Related