Verizon CyberPower - $10 (Brockton)

Verizon CyberPower - I believe this is used with Verizon FIOS to provide power in the case of power outages so that you can continue to use the phone during the outages.
$10 More detailed description at this link: https://www.
ebay.
com/itm/225953455948?chn=ps&com_cvv=8fb3d522dc163aeadb66e08cd7450cbbdddc64c6cf2e8891f6d48747c6d56d2c