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 Share this: Share on Reddit (Opens in new window) Reddit TweetShare on Tumblr Share on WhatsApp (Opens in new window) WhatsApp Share on Telegram (Opens in new window) Telegram Like Loading... Related